- US hardcover edition by Del Rey the 12 of August 2014 with ISBN 9780553392425. Cover art by Alejandro Colucci.
- The Advance Reader Copy used the same cover design as the first edition hardback.
- UK hardcover edition by HarperVoyager the 12th of August 2014 with ISBN 9780007444175 with cover art by Jackie Morris.
- The Advance Reader Copy had a simple design with the lettering from the finished version and a single bee. It was distributed wrapped in an illustrated paper and tied with a blue ribbon with a golden key on it.
- An Australia & New Zealand trade paperback edition from HarperVoyager the 12th of August 2014 with ISBN 9780007444199 and Morris cover art.
- A UK paperback edition from Harper Voyager the 16th of July 2015 with ISBN 9780007444205.
- A US paperback edition from Del Rey the 28th of July 2015 with ISBN 9780553392913.
- Kindle edition from HarperVoyager the 12th of August 2014 with ASIN B00IHS20P0.
- An unabridged audio book by Harper Collins the 12 of August 2014, narrated by Lee Maxwell-Simpson and Avita Jay in two parts:
- An unabridged audio book by Random House Audio the 12 of August 2014 with ISBN 9780553546354 / ASIN B00K2899I4 and length of 20 hours, narrated by Elliot Hill.
- a Dutch translation titled De Moordenaar van de Nar the 29th of September 2014 with ISBN 9789024564842 (hardback). A numbered signed Collector's Edition will be available with ISBN 9789024565504. Cover art by Marco Lap.
- a French translation in two parts from Pygmalion
- Le Fou et l'Assassin the 29 of October 2014 with ISBN 9782756411187. Reprinted by France Loisirs with ISBN 9782298100778 in 2015 and again by J'ai lu the 6th of January 2016 with ISBN 9782290118405.
- Le Fou et l'Assassin: La Fille de l'Assassin the 11th of March 2015 with ISBN 9782756415055. Reprinted by France Loisirs (ISBN?) and again by J'ai lu the 13th of April 2016 with ISBN 9782290119129.
- a Hebrew translation הרוצח של הליצן the 31st of March 2015 by Opus with ISBN 150977
- an Italian translation L'Assassino - Il Ritorno the 17th of November 2015 from Sperling & Kupfer with ISBN 978882005936 (hardback). Translated by Maria C. Scotto, cover art by Sasha Vinogradova. Kindle edition released simultaneously with ASIN B017YFH9S4.
- Find Fool's Assassin on bookdepository.com
- Find Fool's Assassin on amazon.com
- Find Fool's Assassin on amazon.co.uk