Bookbinder's leather is a type of leather used in bookbinding. It is usually made from cowhide and is tanned and dyed to create a durable material that can be used to bind books. The two crossword solutions for the term are ROAN and MOROCCO. ROAN is a type of leather that is made from the hide of a cow, sheep, or goat and is usually dyed a reddish-brown color. MOROCCO is a type of leather that is made from goatskin and is usually dyed black or red. It is known for its durability and is often used in bookbinding.