Here are some nice reviews from the journals Cryptologia and the International Journal of Intelligence:

John Dooley really liked it and said: “this is a very well researched, accessible, and readable book.”

and the Journal link:

Now here’s a fun review from the CIA’s Studies in Intelligence

“readers will find in Prisoners, Lovers, & Spies a thought-provoking history of SW and secret communications…. In an epilogue, Macrakis blasts the CIA for its de- classification policies… Her personal views aside, Prisoners, Lovers, & Spies is a valuable contribution to the literature.” [bold added !!!]

For full review(scroll down to P…you can also read his review of the Snowden books…):

New Review, October 2014, in The Nation:

“gripping” says Daily Mail, UK and names it Book of the Week!

“entertaining stories told by the American academic Kristie Macrakis in her beguilingly informative and sweeping survey of hidden communication” The Spectator

“an immensely diverting overview of secret and hidden writing.” The Independent, UK.

“At hand is an utterly fascinating account…the author knows her territory.Read this book.” Joseph C. Goulden, Washington Times.

“her enthusiasm and appetite for her subject are infectious.”
Alan Judd, Literary Review

Kirkus Book Review: “lively history…engaging prose…engrossing.”

See Suzy Spencer’s nice article about me and the book:

And Rebecca Onion’s article in Mental

“For every person who experimented with secret inks… at last we have a splendidly written history of how these inks were developed and the role they played in history. As a bonus, in the Appendix is a useful guide to secret inks and ‘kitchen chemistry experiments,’ where the reader will find the secret formulas and instructions needed to make your messages disappear… and appear again! I enthusiastically recommend this book!”
–H. Keith Melton, coauthor (with Robert Wallace) of Spycraft: The Secret History of the CIA’s Spytechs, from Communism to al-Qaeda

Prisoners, Lovers, and Spies is a thorough and interesting historical look at the origin and evolution of ‘secret’ or ‘invisible’ writing. The book is written in a very reader friendly, accessible style, making it suitable for a broad audience. The brief historical vignettes of individuals such as Kurt Frederick Ludwig and Madame Maria de Victorica and their use of invisible ink are light, breezy, and easily digested.”
–Allen Hornblum, author of Acres of Skin and The Invisible Harry Gold

“Kristie Macrakis here reveals long-hidden secrets of invisible ink, microdots, and other ways spies, lovers, generals, businessmen, and ordinary folk have concealed messages they didn’t want others to read.  No one else has ever done this so well and so fully.  A tour de force!”
–David Kahn, author of The Codebreakers

“Kristie Macrakis’s fascinating, pathbreaking book shows how secret writing was developed by both lovers and spies (an exotic combination in the history of covert communication). Though nowadays widely regarded as child’s play, in the world wars and Cold War of the twentieth century, secret writing remained, as Macrakis vividly demonstrates, a deeply serious business.”
–Christopher Andrew, Cambridge University