For shits and giggles I bought this book from these guys... I gotta say I learned absolutley nothing I didn't already know. Two words come to mind, common sense.
Getting models is easy, if you treat them professionally and don't try to dink/em, they'll send ya friends. You could place ads like many guys do, and I am sure that works great.... Unseen and others have some great content. Lame as it sounds, the best place I found was the local mall. Hotties always work in those clothing stores... and if you're not an old man that will be looked as perverted, you'll do fine. Number one thing I hear from girls I shoot is that they're happy I am not some perverted old guy (60+) (rather, a perverted young guy). I don't shoot content though like unseen.
I'm not slamming Unseen or other providers... they've been doing it a long time and their track record and photos speak for themselves. (props to most of them) I'm just saying you don't need to buy a book... get a good camera, and then it's trial and error... just use common sense and above all, be straight with them.
To those I pissed off, go fuck yourself. ;)