While I like the Lyman, and also have the Sierra, Nosler, and Hornady, ABC's of Reloading, Cast handbook...
I'll have to say that the Speer is a good read for the beginner. Good illustrations of what they're talking about. The load data touts their bullets whereas the Lyman or Cast handbook don't refer to bullets you can't actually buy. Second in line I'd have to put the Sierra. The short and long range trajectory tables per BC are second to none. Any of the big four show tables of anticipated velocity per load instead of a Min/Max value.
I started with the Speer manual and a Lyman Turret press some 25 years ago. It must have been good literature! I haven't blown my guns or myself up yet.
-Steve