A: Any of the following would be excellent choices for reading material:
<ul type="square">[*]PL & NL Poker by Bob Ciaffone & Stewart Reuben[*]Super System by Doyle Brunson[*]Championship No-Limit & Pot-Limit Hold'Em by TJ Cloutier[/list]
I would add Harrington on Hold'em Part 1, since it has plenty of excellent non-tournament specific NL advice.