I don't play roulette in Vegas. The odds are too far in the house's favor. Blackjack, however, is a beatable game. For basic strategy I recommend Edward O. Thorpe's classic, "Beat the Dealer." While this book is very old, nearly every new book I have read on blackjack still refers back to Thorpe's work.
Beat the Dealer also goes into card counting, and how to adjust bets according to the count. However, while card counting is not illegal, most casinos frown on this activity, and will ask you to leave if they suspect you of card counting. A banishment from a casino will only happen if you are wagering big money. A guy like me that bets $5 to $25 dollars a hand is not going to get noticed.
Some of the better books can be found at Gambler's Book Shop. Google them or visit their store in Vegas.
My games of choice are craps, blackjack and football (NFL & college).