ORIGINAL: NOVAMEGA
It's a silverfish ....... They eat books
nope its not a silver fish I have those in the house from time to time in the basement

That is a silver fish
The thing Sheo has is a house centipede(like someone else said also sometimes called a thousand legger) we get them quite often in winter around here due to it being an older house, and when it gets cold once the heaters go on they run out. Actually saw one at work last night running around. As for poisonous I don't thing they could cause harm to a human, or anything else bigger than a bug.
Centipedes usually are found in damp, dark places, such as under stones, leaf mulch, or logs. Indoors, centipedes may occur in damp areas of basements, closets, or bathrooms, or anywhere in the home where insects occur. During the day they hide in dark cracks and crevices, coming out at night to search for insects to eat.
I sometimes find the reaction people have to them hilarious I've seen grown men jump like a little kid when they run out

Maybe its used to be fascinated with insects when I was a kid, and would catch anything, and everything I saw (even had a black widow at one point, scared the crap out of me when I found out what it was

) that they don't bother me. Only insects I hate are roaches(due to their reproductive, and invasive abilities, otherwise I'm facinated with them), and bees(was stung way too many times as a kid)