Main Lesson Journal – Large – Portrait These lesson books feature heavy 120 gsm (31 lb.) chlorine-free paper which is well-suited for use with crayons or ink. You may choose either a three staples or spiral binding. The cover is 280 gsm (73 lb.) card stock with leather impression. Portrait or landscape orientation is available. Books are available with or without onion skin page separators to protect artwork and written pages.