Princess Academy: Palace of Stone by Shannon Hale is $2.99 TODAY ONLY in ebook format on Amazon. This book was released last August and so this is pretty early for this deep of a discount--it's not even in paperback yet! And, yes, it's the sequel to the Newbery Honor book. I gave the hardcover to a niece for Christmas.
Coming down from the mountain to a new life in the city seems a thrill beyond imagining. When Miri and her friends from Mount Eskel set off to help the future princess Britta prepare for her royal wedding, she is happy about her chance to attend school in the capital city. There, Miri befriends students who seem so sophisticated and exciting . . . until she learns that they have some frightening plans. They think that Miri will help them, that she should help them. Soon Miri finds herself torn between loyalty to the princess and her new friends' ideas, between an old love and a new crush, and between her small mountain home and the bustling city.
Picking up where Princess Academy left off, this incredible stand-alone story celebrates the joys of friendship, the delight of romance, and the fate of a beloved fairy tale kingdom.