For beginner may I suggest Roy Harris BJJ 101 Volumes 1-2 (escapes, hold downs). Not many submissions, if any at all, but plenty of good information.
For intermediate, Roy Harris BJJ 101 Volume-3, Arm Locks Volume 1 and 2 (leg locks, straight arm locks, bent arm locks).
If you like, send me and e-mail and I will let you borrow my copies. If you like them you can buy some of your own.