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- ISBN: 9780439922203 | 0439922208
- Cover: Paperback
- Copyright: 6/1/2007
Sammy Jacobs is into ghosts and science fiction. Not exactly the smartest hobby, at least not if you ask SammyÂ’s parents. TheyÂ’re research scientists and they only believe in real science. But now SammyÂ’s met someone whoÂ’s totally un-real. HeÂ’s hanging out in SammyÂ’s room. And eating his cereal at breakfast. SammyÂ’s got to find a way to get rid of his new "friend". Only problem is... SammyÂ’s new friend is invisible!