Drogenkunde (German Edition) by Heinz August Hoppe, Willy Peyer Hardcover, 335 Pages, Published 1947 by Walter De Gruyter ISBN-13: 978-3-11-113566-3, ISBN: 3-11-113566-7
Hashtag(1st Edition) Danger: Volume One: Panic on Dinosaur Mountain! by Tom Peyer , Chris Giarrusso , Randy Elliott , Andy Troy Paperback, 168 Pages, Published 2019 by Ahoy Comics ISBN-13: 978-0-9980442-6-2, ISBN: 0-9980442-6-1