Where could I purchase the BlueBook(BB) and the DirectHits(DH)?

<p>Thank You, I know that the BlueBook and DirectHits will prepare me for the SAT. However, what should I do about the ACT? SAT>ACT, ACT has English,Mathematics,Writing, and Science. Since SAT has three of the following, and the SAT is more difficult than the ACT, would I only need to prepare myself for the science section</p>