where to get released sat subject tests?

<p>can we get a book of a lot of official subject tests like with the reasoning test and the blue book, or can we only use tests from non collegeboard sources? i want to take literature and math II, if that's relevant :)</p>

<p>oh and i've also heard that literature is really difficult, can someone confirm/deny this? i've been a lifelong reader and scored 800 in a CR blue book practice test, but i've heard that the lit test is on another level.</p>