May 3rd, 2025
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The books of May are here—fresh, fierce, and full of feels.

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Wedding season includes searching for a missing bride�and a killer . . .


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Sometimes the path forward begins with a step back.


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One island. Three generations. A summer that changes everything.


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A snapshot made them legends. What it didn�t show could tear them apart.


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This life coach will give you a lift!


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A twisty, "addictive," mystery about jealousy and bad intentions


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Trapped by magic, haunted by muses�she must master the cards before they�re lost to darkness.


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Masquerades, secrets, and a forbidden romance stitched into every seam.


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A vanished manuscript. A murdered expert. A castle full of secrets�and one sharp-witted sleuth.


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Two warrior angels. First friends, now lovers. Their future? A WILD UNKNOWN.


The Blue Diamond by Leonard Goldberg

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Also by Leonard Goldberg:

A Scandalous Affair, March 2025
Hardcover / e-Book
The Wayward Prince, July 2023
Hardcover / e-Book
The Blue Diamond, June 2023
Trade Paperback / e-Book
The Blue Diamond, June 2022
Hardcover / e-Book
The Abduction of Pretty Penny, May 2022
Trade Paperback / e-Book
The Abduction of Pretty Penny, June 2021
Hardcover / e-Book
The Art of Deception, May 2021
Trade Size / e-Book
The Disappearance of Alistair Ainsworth, June 2020
Trade Size / e-Book (reprint)
The Art of Deception, June 2020
Hardcover / e-Book
The Disappearance of Alistair Ainsworth, June 2019
Hardcover / e-Book
A Study in Treason, June 2018
Hardcover / e-Book
The Daughter of Sherlock Holmes, May 2018
Trade Size
The Daughter of Sherlock Holmes, June 2017
Hardcover / e-Book
Plague Ship, October 2013
Paperback / e-Book

The Blue Diamond
Leonard Goldberg

The Daughter of Sherlock Holmes Mysteries #6
Minotaur Books
June 2023
On Sale: June 6, 2023
352 pages
ISBN: 1250846749
EAN: 9781250846747
Kindle: B09CNF9D8X
Trade Paperback / e-Book
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Other Editions
Hardcover (June 2022)

Mystery Private Eye

The fate of the allied forces lies in the hands of Joanna and the Watsons in the next Daughter of Sherlock Holmes mystery from USA Today bestselling author Leonard Goldberg.

During a critical stage in World War One, the Governor-General of South Africa journeys to London for a meeting of The Imperial War Conference. Days prior to the conference, the Governor-General is scheduled to have an audience at Buckingham Palace at which time a most precious blue diamond will be presented to King Edward as a symbolic gesture of the colonies’ resolute and never-ending allegiance to England.

The flawless blue diamond, with its magnificent luster, weighs nearly 3000 carats which renders it one of the world’s largest and most valuable gems. On the Governor-General’s arrival, he is ensconced at the fashionable Windsor Hotel under the tightest security, with his entire entourage and formidable security team occupying the entire penthouse floor. All entrances and exits are locked down and closely guarded, and no one is allowed entrance after 6 PM.

Despite the extreme precautions, the famous diamond is stolen from the Governor-General’s suite in the middle of the night, with no clues left behind. With Scotland Yard baffled, Joanna and the Watsons are called in to investigate the theft and it becomes clear that the crime is not simply the work of a master thief, but one that could greatly aid the Germans and turn the tide of war in their favor. Time is of the essence and the blue diamond must be recovered before it begins its travels which could cause irreparable damage to the allied war plans.

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