Among titles hitting bookshelves next week is a picture book about picture day at school; the launch of a middle grade series set in a familiar, fantastical universe; and a royally dramatic YA novel.

United as One by Pittacus Lore. HarperCollins, $18.99; ISBN 978-0-06-238765-3. The Lorien Legacies sci-fi YA series reaches its conclusion in this seventh installment, in which the Garde do all they can to end the war with the Earth-invading Mogadorians.

Empire of Dust by Eleanor Herman. Harlequin Teen, $19.99; ISBN 978-0-373-21192-0. Herman continues her Blood of Gods and Royals YA series in this second book, in which characters vie for the throne in a magical setting.

And I Darken by Kiersten White. Delacorte, $18.99; ISBN 978-0-553-52231-0. What if Vlad Tepes, the historical inspiration for Dracula, had actually been a fearsome and brilliant teenage girl? That’s the question raised in this alternate history, first in a trilogy.

Jim Henson’s The Dark Crystal: Shadows of the Dark Crystal #1 by J.M. Lee and Brian Froud. Grosset & Dunlap, $17.99; ISBN 978-0-448-48289-7. This [fan-driven series] http://www.publishersweekly.com/pw/by-topic/industry-news/licensing/article/66650-embracing-the-fans.html takes place before the events of the movie.

The Night Before Class Picture Day by Natasha Wing. Grosset & Dunlap, $4.99 paper; ISBN 978-0-448-48902-5. In the latest of the Night Before installment, a kindergarten class gets ready for class picture day.

Nine, Ten: A September 11 Story by Nora Raleigh Baskin. For a generation of readers born and raised after 9/11, Baskin (Ruby on the Outside) offers a powerful middle grade account of how the events changed lives. The book earned a starred review from PW.

For more children’s and YA titles on sale throughout the month of June, check out PW’s full On-Sale Calendar.