I didn't trust the other posters on here, but everyone is right -all you need is First Aid CS, that's it. I read through the whole thing in one weekend. Started reading friday, finished sunday night. Took the test on Monday. Just got my score - PASS. I was nervous that I hadn't done enough for the test, so I was frantically looking for posts on people who studied only a little and passed the night before. If you are a US medical student and have done all your core clerkships, you won't have a problem - 96% pass rate, I don't know any other test we'll ever take with those types of odds. Read First Aid, take the test, and enjoy the Pass.