Paypal Hacks: 100 Industrial-Strength Tips & Tools by Shannon
Sofield, Dave Nielson & Dave Burchell.

Everything from how to set up a basic personal account to advanced web API
techniques. It’s an acceptable overview with tips, and I’m surprised by
how simple it is to implement Paypal for various things. I guess I should
have guessed, considering it’s popularity.

Historically, I’ve found Paypal hard to work with for various reasons (I
don’t use it often enough to keep an account funded or remember
passwords… things like that), but the example of using Paypal to pay a
coworker for your share of lunch has inspired me to revisit the service.

Now, I’m ready to take over the world.