Barron's Biology

[Panteleimon]

Hi
i am an english teacher in Greece and i am doing a lesson to an 17 years old on SAT. However, the university asked him for subject tests too and we chose biology since he is strong in it.
However, we ordered barron's biology e/m and his biology teacher had a look in it and said that's university level and that he will not manage to know all these. But he had a look on biology practice tests on the net and found them enough easy for my student.

So I was wondering: Is Barron's Sat SUbject TEst Biology E/M appropriate for SAT Subject TEst on bIology (23 January 2010) or is it too above the required level?
Which book would you propose?
Best,
Panteleimon Chatziioannou.