"Eccentric inventors travel back in time to relive their childhood discovery of the alphabet...Infused with a sense of fun—a worthwhile addition to the alphabet-book canon." —Kirkus Reviews "...both an ABC-reader and a celebration of amazing STEM inventions in everyday life, helping readers remember their letters through association with fun, STEM-related vocabulary. Mr. Mazoo and Mr. Tyler are as quirky and engaging as ever." —The Children's Book Review You may not know this about Mr. Mazoo and Mr. Tyler, but they are scientists! And, more precisely, they are engineers. That means they build all sorts of amazing machines. On this adventure, they decide to jump into a most unusual kind of machine–a time machine! They travel back to a very special time when they went on one of the greatest adventures of their lives: learning their ABCs! And they want you to come along! Rachel L. Westbrook and Donald A. Westbrook, authors of the Mr. Mazoo and Mr. Tyler series, live in Central Texas with their two children, one of whom learned her ABCs (and a few new words) in the course of writing this book.