I will no longer be recommending Princeton Review’s Math 2 prep books, because their latest edition features a test that is a problem-by-problem parody of an official College Board test.
I don’t have a problem with close copies of official tests — on the contrary, that can be a very sensible strategy for creators of practice materials. However, my methods rely on a rich collection of problems that are different enough from one another that the student can come to generate underlying principles that apply broadly to many different kinds of problems.
Those methods of mine are undermined by problems that closely mimic other problems in the training corpus.
Therefore, I have to reject PR tests, because they follow a strategy that undermines mine.
(Alas, poor Yorick.)