Was he at a thrift shop?
Did he have more than one goal?
Was he looking for a book that he had bought?
Was the book in yesterday's pile of books?
Did he pile up seven books yesterday?
Did he buy all seven books?
At the last moment, did he change his address?
Did he put all seven books back on the shelf?
Did his personal library have more than 1,000 books?
Had he read most of his books?