For Adults:
NPR: Librarian Nancy Pearl Picks Summer's Best Books
The Boston Globe: The books of summer
Asheville Citizen Times: Summer, and the reading is easy: From worldly to local, new books are bountiful
Seattle Public Library: Staff Favorites: Three more novels for your summer reading
UC Davis: Smart Summer Reading
TheoSource: Summer Reading: What's in Your Stack booklists by Christians and theologians
Unashamed Workman: 100 Recommended Reads divided into parts: For Unbelievers, For New Christians, Defending Your Faith, Bible Studies, The Church, Evangelism, Theology, The Cross of Christ, Baptism, Prayer, For Singles and those Dating, On Marriage, Pastoral Issues, Eldership, The Pastor's Role, For Women, For Men, and Biographies
Examiner: Top 10 + 1 intriguing science books to take on vacation
Read Street: Summer reading: more dirty books
Buzz Sugar: Summer Reading: 12 New Books to Check Out
Women's Enews: Women's Writing Fires Up Summer Reading Lists
Chicago Boyz: Summer Book Recommendations for a Friend
Weddings in Vieques: Excellent Summer Reading Recommendations for Brides-to-Be
Children and Young Adults:
Kansas City Star: Summer reading for tweens
About.com: Great All-Ages Manga for Young Readers: Kid-Friendly Graphic Novels Full of Fun, Fantasy and Pocket Monsters
Publisher's Weekly: ShelfTalker's Summer Reading List for young adults (annotated shortlist)
School Library Journal: Searching for the Perfect Summer Reading List? The Coretta Scott King Committee offers some terrific choices