I have Speer, Hornady, Sierra, Lyman 49'th, Lee, Hodgon, and 7 or 8 booklets that are usually free in the reloading areas in the store.
Lyman 3 and 4, and RCBS cast bullet books and 3 shotgun reloading books.
Pick up as many as you can. It is very helpful. I think everyone should have at least 3 for comparison. It lets you see what the top performing powders were in they're testing. My favorites are probly Hornady, Sierra and Speer. The Lyman 49'th is nice cause it covers different brands since they dont make powder or jacketed bullets.