Well first he does the funky chicken, or a reasonable facsimile, with Shelia - then it's all about getting home. After some misadventures with a horde of impish spirits and having to kill a duplicate of himself Ash finds the books. Three to be exact, which makes him none to happy, especially since the first contains a black hole and the second appears to be a lost tome of Hitchcock. Unfortunately one must speak an incantation before touching the Book of the Dead, Ash sort of forgets the last word and tries to mumble it, setting free the great evil. Ash is witty and slightly unbalances as ever, while you'll be rather amused to watch skeletons shriek in fear just before tragedy befalls them.
Nobody ever listens to the wiseman.
Department store employees know how to construct robotic limbs. If you ever swallow a six inch tall version of yourself do not add water. Some books contain black holes. Never mumble the magic words. Every car has one chemistry book in it's trunk.