SAT Math Books (Reasoning, Level I, and Level II)

<p>I plan on taking the SAT in May and the SAT Subject Test in June (level I at this point but I might switch to level II).
I need lots of practice in terms of SAT Math but I don't really have money to waste on books that I won't need (I would get them from the library but I need them for more than what the loan period will allow). Would only buying a level II book (Amazon.com:</a> Barron's SAT Subject Test Math Level 2, 8th Edition: Richard Ku M.A., Howard P. Dodge: Books) be enough for SAT Math too? Or, if I decide to stick to level I, could I just buy a reasoning SAT Math book (Amazon.com:</a> Math Workbook for the New SAT (Barron's Math Workbook for the Sat I)3rd Edition: Lawrence S. Leff: Books?%5DAmazon.com:">http://www.amazon.com/Math-Workbook-New-SAT-Barrons/dp/0764123653/ref=sr_1_1?ie=UTF8&s=books&qid=1236386030&sr=1-1)?) From my understanding the caliber of SAT Math goes somewhat like SAT Level I < SAT Math Reasoning < SAT Level II</p>