All of Robert's labyrinth books have been or soon will be updated and expanded. See the following titles.
EACH TITLE IS A LINK TO AMAZON.COM
Most recently, the largest of Robert's labyrinth books,
This book describes labyrinths in church-appropriate language. It is in question and answer format.
Not yet updated and currently out of print:
Origin, Symbolism and Design of the Chartres Labyrinth
Some of the proceeds from the sale of these labyrinth books go to Veriditas, the voice of the labyrinth movement.
REQUEST FOR REVIEWS. If you read one or more of my books, please leave a favorable review. Reviews are essential these days. Do you look at reviews before you buy something? I always do. Would you buy a product with few reviews? Maybe not. Please take a moment to help out. Thanks.