you don't even have to read the book, just pick it and flip through it to find examples of how dialogue is used. i think to make it simpler, take ten minutes and do a little excercise: if D is dialogue, T is a dialogue tag (like 'he said' or 'Tom belched') and X is description, arrange some or all of these into a list, print it out and keep it by your keyboard until you don't need it anymore.
for example:
X. "D."
"D," T.
X. "D," T. X.
and just find as many combinations as you can. you're likely to come up with some pretty ridiculous examples you'll never use, but also some interesting things like:
"I... can't... help it" -- Biff's finger tugged on the trigger-- "you... have... to die!"
the one thing i've never been criticized on is my dialogue. funny, that. there're some basic 'rules' to keep in mind, such as don't make the character sound stilted if that's not your intention (my definition of stilted, others may disagree, is when a character's speach is unrealistic and usually too formal), you can use dialogue to kill a lot of exposition, but avoid the 'well, bob, as you know...' trap, and good dialogue isn't necessarily *realistic* dialogue, which, imo, is a tough concept to grasp. i think the perfect example of the last thing is in 'star wars' when obi-wan says, 'you must do what you feel is right, of course.' it's an awesome bit of dialogue... which no one i've ever met in real life would ever say. after he says, 'that's good, you've taken your first steps into a larger world,' or whatever, in real life i'd look at this old man who's been alone for twenty years, the fact he's wearing a robe with a phallic symbol hanging off his belt, and who speaks like that and say, 'yeah, you're a pervert, ain'tcha? this whole force thing is just a scam to get into my poncho, isn't it? we got robots for that kind of thing, old man!'