The A to Z Mysteries Complete Collection by Ron Roy is a 26-book set of paperback short stories perfect for young adults, ages 4-12, and adults. Published by Random House in 2015, the series features a fictional narrative in English with a focus on mystery, action, and adventure. Each book in the collection revolves around a different letter of the alphabet, making it an engaging and educational read for fans of the genre. This set is ideal for those interested in sleuthing, writing, and collecting mysteries in a fun and engaging way.