Finished The Host for the second time, and still liked it, so it's at least a 2-read. Had to return it, so I'm not certain if it could have been more (the scale goes from 1 to 5, or technically from 0 to 5).
A 5-read book is one I can read five times in a row and still like it. Usually by the time I read it for the second time I'm just reading my favorite parts, which makes it a 1-read. So the host might be a 3-read but I'll need to get my own copy to make sure.