If you love independent bookstores, check out BookSense.  You can get great book reviews, info on local author events, and scads of book lists ("Summer Paperback Picks," "History Top Ten," "Summer Childrens Picks" and many more) for your summer reading.  The bookstore locator provides nice advanced search options such as specialty (children's, travel, mystery, aviation, tech, etc) and stores with websites.  Here's the lowdown on BookSense from their website:

BookSense.com is a family of independent-bookseller websites. (And it's the e-commerce arm of the American Booksellers Association's Book Sense program.)

When you visit a BookSense.com virtual bookstore, you will experience the knowledge and passion of independent booksellers who share their love of books with their customers and their communities. You'll have access to information and news about local authors, store events, and myriad staff recommendations - and you will also be presented with content that reflects the collective wisdom of booksellers from all 50 states and Puerto Rico.