What is the best book to use to study for the ASVAB?

Im going to MEPS for the navy and I want to be offered a good job. Something like Electronics Technician. I have over 100 college credits and was told by my recruiter that I would begin as an E3 and that based on my score on the test that I took the day I went in that I wouldn't need to study for the ASVAB. I haven't taken a math course in a few semesters so I told him I wanted a week or so to brush up on my math anyway. So im looking for the best book available to study for it. Any suggestions would be appreciated, thank you.