We've got two books in the reference section that will help with Texas laws.... There's Texas Transaction Guide, which contains sample forms of contracts, custody, etc... and a few restatements of law.
Then there's Texas Law Finder. This book refers you to the laws you'll need given your problem.
Then you can check the actual Texas Code to read the law.
I would also suggest Lexis Nexis to find the actual text of the law.....