Odyssey AS Level past papers anyone?Watch
You can look at exam papers from 2009-2012.
Are you self-taught? If not, why are you not being given past papers by your teacher?
In response to "which books have come up in the past", obviously you need to have read all the prescribed books in order to answer the Section B questions... but for Section A:
2009 - Book 4 (question based around the suitors) and Book 11 (Odysseus meets his mother in Hades)
2010 - Book 10 (bag of winds, essay on Odysseus's communication with his men) and Book 19 (Odysseus meets Penelope in disguise - essay on how they test each other)
2011 - Book 6 (Nausicaa, essay on gods) and Book 21 (contest of the bow, essay on Telemachus)
2012 - Book 9 (Cyclops, essay on supernatural) and Book 19 (Penelope and the suitors, essay on Penelope)