To be honest, a basic poker book is probably going to be too complex for the games you're playing in unless you're playing at higher limits than I'm assuming.
Ed Miller just wrote a good book about low limit holdem, but even that's a little complicated.
Let me define some simple terms for you really quick.
Tight - Player who doesn't play many hands before the flop.
Loose - Player who playes less than premium hands before the flop, ussually any two suited cards, any ace, etc.
Agressive - Player who bets and raises frequently before and after the flop.
Weak - Player who calls most bets but rarely raises or makes a first bet. Would be happy to check evey round most times.
Poker players ussually describe other players by combing two of the four terms so you get a few catagories of players:
Loose/Weak: Player who plays too many hands before the flop, and will call most bets all the way to a showdon and rarely raises even with the best hand. AKA Calling Station.
Loosge/Agressive: Player who playes too many hands before the flop, raises often even with poor hands and will rarely fold. AKA Maniacs.
Weak/Tight: Player who playes few hands before the flop and playes them passively. Will not raise pre-flop with anything but aces, will fold if there is straight or flush draw on the board, etc.
Tight/Agressive: Player who playes few hands before the flop, but playes them agressively with the long term goal of getting as much money on the table as possible when he has the best hand and getting out when he has the worst hand.
Most Holdem players progress through the four "archtypes" as they learn the game. Almost everyone starts out Loose/Weak playing too many hands, calling bets to see the other guys cards when they know they're beat, etc.
Most people eventually decide they're sick of getting sucked out on by bad river cards and learn that they need to raise to try and get some people to fold longshot draws before the river. They still tend to play to loosely however and some turn into Maniacs.
Sometimes Loose Agressive players get a good run of cards and make a lot of money, and come to the conclusion that this style of play is profitable. They ussually end up loosing all their money shortly after that.
Most players then progress to the Weak/Tight stage, which is basically what I'm advising you to play in a loose game, where they realize they can beat a loose game by playing quality hands before the flop, raising when they have the best hand and folding when they don't.
Most people don't become tight/agressive players untill they move up in limits to games where it's often heads up by the turn and realize bluffing can start making them some money, and calling bluff attempts can too. IT's a completely diffrent game at that point.
Weak tight play will easily beat low limit online games, probably for 3 or 4 BB/hour or more long term
____________________________
Disclaimer:
To make a long story short, I don't take any responsibility for anything I post here. It's not news, it's not truth, it's not serious. It's parody. It's satire. It's bitter. It's angsty. Your mother's a *****. You like to jack off dogs. That's right, you heard me. You like to grab that dog by the bone and rub it like a ski pole. Your dad? Gay. Your priest? Straight. **** off and let me post. It's not true, it's all in good fun. Now go away.