I wanted to say thank you to everyone who helped me find this book. It looks like the correct answer was Tunnel to Yesterday by Jerome Beatty! Lots of people guessed that one! Thank you Collective Brain! Original message: I am trying to find the name of a book for a customer. It was a kids book that he read in the late 1980s that had kids that were able to time travel back to see the Mayflower land at Plymouth Rock. There was some sort of adult mentor or guide in it that was really into macarons. The kids were able to travel back and forth in time by saying "ptchwyx" - that really stuck with him. He isn't sure if it was part of a series, or how old it was when he read it. Does any of that ring a bell with someone? Thanks for your help! Melissa Lupino Library Director Bessemer Public Library 411 S. Sophie St. Bessemer, MI 49911 (906)667-0404