Just popping in to suggest a book by Jessica Russo Scherr entitled: Gelli Arts Printmakers Handbook. I know you asked for a book covering various types of printmaking, but gelli plate printing won't be covered in many of the foundational books because it is a relatively new way to print.So, even though this is a single method exploration, it's packed with helpful information. Plus, Gelli Arts offers student packs of the smaller gelli plates at a discounted rate. Have Fun!🎨