I went searching for word counts for some of the books I have read this year and came across a couple really useful sites for that and thought I would share since there have been questions in past years about where to find word/page count information. For page counts I much prefer GoodReads but hadn't found a decent reference for word counts.
http://www.arbookfind.com/
http://src.scholastic.com/bookexpert/
Both are geared toward teachers/parents/students in K-12 to get information for their reading programs, so the book choices aren't nearly comprehensive but I was able to find information (word counts) for a surprising number of books that I hadn't been able to find elsewhere.
These do give slightly different results but they are very close to each other. They do have different selections too.