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Book Summary and Reviews of The World's Greatest Detective and Her Just Okay Assistant by Liza Tully

The World's Greatest Detective and Her Just Okay Assistant by Liza Tully

The World's Greatest Detective and Her Just Okay Assistant

by Liza Tully

  • Critics' Consensus (2):
  • Readers' Rating (73):
  • Published:
  • Jul 2025, 400 pages
  • Rate this book

About this book

Book Summary

A great detective's young assistant yearns for glory, but first they have learn to get along in this delightful feel good mystery.

Olivia Blunt doesn't want to be an assistant detective for the rest of her life. She's determined to learn everything she can from her mentor and renowned investigator, Aubrey Merritt, but the latter is no easy grader.

After weeks of fielding phone calls from parties desperate for the world-renowned detective's help, a case comes across Olivia's desk that just might be worthy of Merritt's skills. On the evening of her sixty-fifth birthday party, Victoria Summersworth somehow fell over her balcony railing to her death on the rocky shore of Lake Champlain. She was a happy woman—rich, beloved, in love, and matriarch of the preeminent Summersworth family. The police have ruled it a suicide, but her daughter Haley thinks it was murder.

Merritt is ever the skeptic, but Olivia believes Haley. Plus, she's desperate to prove her investigative skills to her aloof boss. But the Summersworth family drama is a complicated web.

Olivia realizes she might be in over her head with this whole detective thing... or she might be unravelling a mystery even bigger than the one she'd started with.

Please be aware that this discussion guide will contain spoilers!
These are original discussion questions written by BookBrowse.


  1. What was your first impression of the two main characters, Aubrey Merritt and Olivia Blunt?
  2. What did you think of the research Olivia did on Merritt before interviewing for the position of assistant?
  3. Merritt tells Olivia that "Truly good people…tend to assume other people are just like them…It's a dangerous state of affairs for them." (p.22). Olivia replies that that's a dark way of looking at things. Which of these characters do you agree with?
  4. What did you think of Olivia's relationship with Trevor? Why do you feel she forgot about his opening, and kept putting off calling his mother?
  5. Although Merritt works closely with the local police department, she ...
Please be aware that this discussion may contain spoilers!

See what our members are saying about this book in our Community Forum.

Overall, what did you think of The World’s Greatest Detective and Her Just Okay Assistant? (No spoilers, please!)
Stepping out of your comfortable, uneventful life & trying something new. This is why I liked this book. Liza Tully's characters are quirky & unsure of their fit with each other. I look forward to her next book in the series & the continued interaction & between her main characters.
-Charlene_M


What are you reading this week? And what did you think of last week’s books? (5/7/2026)
...there was https://www.bookbrowse.com/bb_briefs/detail/index.cfm/ezine_preview_number/21191/the-worlds-greatest-detective-and-her-just-okay-assistant The World's Greatest Detective and Her Just Okay Assistant by Liza Tully for the book club here. It was a nice, cozy mystery. For this type of book I'm more of a thumbs-up/thumbs-down rater. It kept me guessing and I enjoy...
-kim.kovacs


About the The World's Greatest Detective & Her Just OK Asst category
Please join BookBrowse in a discussion of https://www.bookbrowse.com/bb_briefs/detail/index.cfm/ezine_preview_number/21191/the-worlds-greatest-detective-and-her-just-okay-assistant The World's Greatest Assistant and Her Just Okay Assistant by Liza Tully.
-kim.kovacs


What are you reading this week? (8/14/2025)
I'm reading Amity Gage's Sea Wife and Liza Tully's The World's Greatest Detective and her Just Okay Assistant.
-Michele_P


What are you reading this week? (7/24/2025)
I will finish "The World's Greatest Detective & Her Just Okay Assistant" by Liza Tully later today (and recommend, especially to anyone who wants something light but not too light). Next will either be "Lloyd NcNeil's Last Ride" by Will Leitch or Ruth Ware's "Woman in Cabin 10" which I'm just now...
-Carol_Ann_Robb

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Reviews

Media Reviews

"This novel succeeds through memorable characters at odds with each other (and sometimes themselves) across generational divides. A solidly entertaining read, especially for lovers of traditional mysteries." —Kirkus Reviews

"This is a classic wealthy-family whodunit centered on a funny and smart pair of women who are opposites in just about every way. Readers will love spending time with this investigatory duo." —Library Journal

This information about The World's Greatest Detective and Her Just Okay Assistant was first featured in "The BookBrowse Review" - BookBrowse's membership magazine, and in our weekly "Publishing This Week" newsletter. Publication information is for the USA, and (unless stated otherwise) represents the first print edition. The reviews are necessarily limited to those that were available to us ahead of publication. If you are the publisher or author and feel that they do not properly reflect the range of media opinion now available, send us a message with the mainstream reviews that you would like to see added.

Any "Author Information" displayed below reflects the author's biography at the time this particular book was published.

Reader Reviews

Write your own reviewwrite your own review

Charlene_M

A bored researcher finds a much more exciting career
Olivia Blunt decides there much be more to life than just sitting behind a desk researching & she's always wanted to do something more adventurous. She reads a famous detective, Aubrey Merritt, is looking for an assistant. "The World's Greatest Detective and Her Just Okay Assistant" by Lisa Tully is the story of Olivia's finding that adventure. Has she made a huge mistake? I liked these characters so much I bought the second book in the series.

Janine_S

Great cozy mystery
I love a good cozy mystery and this book certainly fits that for me. This one has a healthy balance of suspense, romance and humor - a trifecta for any reader.
Olivia Blunt is tired of her fact-checking job and applies to be an assistant to the "world's greatest detective," Aubrey Merritt. Merritt is a no nonsense, precise and coldish woman and suffers no fools gladly. No one is more surprised than Olivia when she's hired. Thinking this is going to be exciting and "a piece of cake," Olivia soon finds it's a tedious job requiring sharp logic and she may be in over her head. When Merritt is hired to investigate a suicide of a wealthy woman, Virginia Summersworth, by her daughter, Haley, Olivia accompanies Merritt to the New Hampshire resort where the death occurred. An interesting cast of characters is assembled as this closed door mystery is unraveled.

Along side the mystery, we have Olivia's romance with her fiancé, Trevor, that adds some depth to Olivia's character. She's a fun and interesting - a great foil to Merritt who is always judging and critiquing her. But as tough as that can be for Olivia, there are lots of humorous moments when these happen (more often than not in Olivia's head too).
Merritt's uptight demeanor is perfect for a woman with the moniker "world's greatest detective."

The mystery itself is cleverly investigated. The denouement where the murderer is announced is so Agatha Christie - I could almost hear Hercule Poirot saying it! I also will be looking forward to the next book because I think Merritt and Olivia could be the new Holmes and Watson.

I’d like to thank BookBrowse and Berkeley Mystery Books for allowing me to read this book.

Linda J. (Urbana, OH)

The Just Okay Assistant Scores
The title was enticing enough for me to request an ARC from Book Browse when offered the opportunity. The read did not disappoint.

Told in the voice of "the just okay assistant," who was just hired by the self-named "World's Greatest Detective." WGD is called by the daughter of a woman whose death was determined to be a suicide which the daughter has trouble accepting.

The number of people of interest does get a little confusing but that is a minor issue. Most compelling to me was the sandpaper abrasiveness of boss and employee (see title). I'm thinking that this is probably the first of a series. I'll be along for the ride with comes later.

Ellen G. (Treynor, IA)

The World's Greatest Detective and Her Just Okay Assistant by Liz Tully is BETTER than okay!
I really enjoyed The World's Greatest Detective and Her Just Okay Assistant by Liz Tully. The book had everything I look for in a mystery. The characters were well-rounded and believable. I especially liked the main characters. Aubrey Merritt instantly appeared in my mind as Helen Mirren, both for her appearance and manner. Olivia Blunt could be played by any reasonably attractive young actress with smarts and snark.

The setting came alive for me, even though I have never been to that part of the country. The clues were well distributed between suspects, keeping me guessing on the final outcome. I will definitely recommend this book for the Mystery Discussion group I facilitate at the local library, when it comes out, and I look forward to sequels!

Debbie_C

Mystery and discovery
A very great read. The mystery and intrigue were great. I loved how the "Okay Apprentice" worked diligently to solve the mystery and was not deterred by the not so flattering comments and 'missing' statements that the detective provided. The Apprentice diligently stayed with the case and added twists to the plot.

Gwen_C

The World's Greatest Detective and Her Just Okay Assistant
The World's Greatest Detective and Her Just Okay Assistant

What a rollicking fun mystery as the delightful title portends! With renowned and snooty Aubrey Merritt and inexperienced but eager Olivia as the awkward crime solving duo, this novel rolls along at an excellent pace. Is the case a murder or a suicide? I particularly liked the chapter titles (fun to speculate) and "Ollie's" written questions to herself as she did her very best to impress her new boss. The locale and character descriptions were apt.

Told through Ollie's perspective, possible suspects pile up, while Merritt reveals nothing. I almost cheered when we had a classic reading of the will when Merritt revealed all - much more than a murder…and like Ollie I missed an obvious clue and only get C for deduction skills…but this book gets an A with me. I'm looking forward to a sequel and a long series!

...28 more reader reviews

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Author Information

Liza Tully

Liza Tully is a pseudonym for Elisabeth Brink, who writes dark thrillers under the name Elisabeth Elo, as well as literary fiction under the name Elisabeth Panttaja Brink.

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