COUNTING EVERY READER Al Gore is said by associates to be surprised that his newest books on family aren't selling well. The pair of books co-written with wife Tipper Gore (one of them is a coffee-table book intended to serve as companion to the "heavier" tome) are apparently headed toward the remainder bin as bookstores move more popular and potential Christmas gift fare into the line of sight of customers. "We aren't selling any," says a sales associate for Borders Books in Bethesda, Maryland. "And we thought given that this is kind of a political book and that it's by...