Teenagers are at an impressionable age, and are constantly seeking guidance and information to help them make good choices in their own lives. You want the fiction and nonfiction your teen girl reads to be both empowering and interesting enough to keep her attention.
If your teen girl is a fan of supernatural and science fiction stories, and she hasn't already read Stephenie Meyer's "Twilight" series, have her start there. After she finishes with those, introduce her to the "Vampire Diaries" series and have her check out "Three Witches" by Paula Jolin. She may also enjoy the "Kitty Norville" books by Carrie Vaughn.
If your girl is into romance and coming-of-age stories, she may enjoy the "Sisterhood of the Traveling Pants" series by Ann Brashares, "What I Saw, and How I Lied" by Judy Blundell and "Living Dead Girl" by Elizabeth Scott.
If your teenage boy is an avid reader, you may find it difficult to keep him in good reading material, especially during those long summer months. Keep your eye on your son's preferences to help you determine which types of books will best suit him.
He may be interested in books like the "Pendragon" series by D.J. McHale, "The Knife of Never Letting Go" by Patrick Ness or the "Doctor Who" adventures if he likes fantasy and science fiction books. Cory Doctorow's "Little Brother" is a perfect choice for a teen who's interested in the latest technology. There are also various "Star Wars" universe novels written specifically for teen readers.
Historical and coming-of-age novels tend to captivate young readers, and your teen reader might enjoy "The Boy Who Dared" by Susan Campbell Bartoletti, "The Last Knight" by Hilari Bell and "Shift" by Jennifer Bradbury.
If he's interested in sports, there are numerous biographical books written by and about athletes from every sport imaginable. Have your young man lose himself in books like "Airman" by Eoin Colfer, "Headlock" by Joyce Sweeney and "Mexican White Boy" by Matt de la Pena.
For more ideas, check out sites like Teenreads.com and The American Library Association for full lists of the what's popular in current teen books. You might also spend some time with your teens at the library or local bookstore. This way they can browse the selections and see if there is anything available that tickles their fancy. While at the library, you may also consider time-honored teen classics like "A Wrinkle in Time," "To Kill a Mocking Bird" and "The Adventures of Huckleberry Finn."