Sea Monsters

Cotton Socks Press recently released its latest book Sea Monsters. A description from the website:

Printed in an edition of only 20, this handmade letterpress book includes 4 etchings on copper printed chine cole onto BFK Rives printmaking paper. Text is printed in 10pt Italian Old Style with 20 pt Augustea for display. The book is handbound into dragon skin paper covers using paper handmade by Reg Lissel. $225.00

There are images of one of the etchings and of the book itself.

P.S. – Can someone tell me what "printed chine cole" means?