I doubt the library would have my book as it's a tiny 3 pound one. But have a look for what's there under nutrition or something like that. My library had a few and there are loads in bookshops if you want to get ideas or invest in a cheap one.
If you can find one that has tables of foods and their GI rating, get that. I'm just learning about the GI rating's of foods and adapting my diet accordingly. I'm not bothering to follow any specific diet - one, b/c some of them are fads and aren't healthy (eg. atkins), two, b/c it's too diffcult with the IBS (eg. south beach would be a nightmare) and three, b/c I'm not doing this to lose weight (although that's a very welcome side effect) but to feel better in myself.