39 Sleep Positions Guide for Couples. - Title: THE SECRET LANGUAGE OF SLEEP - Author: Evany Thomas - Illustrator: Amelia Bauer - Contents: 39 position guide for couples - Cover Color: Blue Purchased from an American thrift store. I was attracted by the compact size and the uniqueness of the content, but I don't think I'll have a chance to read it, so I'm putting it up for sale here. There are some stains on the front and back covers. (Please check images 6 and 7.)