Accompanied by an eccentric, human-sized rat, Liza embarks on a perilous quest through an underground realm to save her brother Patrick, whose soul has been stolen by the evilest of creatures--the spider-like spindlers.

"In the dazzling conclusion to the Greystone Secrets series from New York Times bestselling author Margaret Peterson Haddix, the Greystones and their doubles, the Gustanos, must team up to save the alternate world--before both worlds are lost. All secrets are revealed in this page-turning, suspenseful story that shows the importance of teamwork, telling your story, and taking action when it matters most." --

As Hollypaw, Lionpaw, and Jaypaw, grandchildren of the legendary Firestar, continue their training to be warrior cats, each is haunted by a different internal struggle that could lead to trouble for all Clans.

Everyone has been trying to keep Gregor from seeing "The Prophecy of Time". That is because the final prophecy calls for the warrior's death. With an army of rats quickly approaching and time running out, Gregor must defend Regalia and get his family back hom safely. There is a code that must be cracked, or all will be lost. It is a war designed to end all wars. The fates of the Underland and the great warrior, Gregor the Overlander, masterfully unfold...

"Kara and her brother, Taff, must find the hidden pieces of Princess Evangeline's grimoire to defeat Rygoth and her army of witches"--

"When Firestar's grandchildren, Hollyleaf, Lionblaze, and Jayfeather, finally discover who their true parents are, there are dire consequences for ThunderClan and the Warrior Code" --

Eleven-year-old Gregor and his younger sister, Boots, return to the Underworld beneath New York City to find the cure for a terrible plague that threatens the life of their mother, as well as the lives of the people, bats, and rats who populate the underworld.

Hannah, Zachary, and Sarah Emily return to Lonely Island to save their friend, Fafnyr, a three-headed dragon, from being captured by a rich man who wants to put the creature on display.

When their great-uncle Gideon invites Tyler and Lucinda to his farm for the summer, they discover his animals are extremely unusual.

Just before starting sixth grade in New York City, a stranger gives Arcade Livingston a necklace that sends him and whoever he is with on wild adventures.