Covers
This book cover with impossible figures was designed by Chepita Ouyeah for autobiographic book of Henry Raad "¿Valió la pena? ¡Valió la pena!". There's impossible triangle on the front side of the book and two impossible constructions on the back side.
Artist's web site http://www.chepitaouyeah.com.
Artist's deviantART profile http://chepita.deviantart.com