Budding-inventor Millicent Madding launches her latest invention to disastrous results, and she has only days to create an antidote before the local bullies wreak havoc and her dearest friendships are destroyed forever.

Lizzy borrows a "The Saurus" from the library to help her write her report on dinosaurs--but when a colossal paper Tyrannosaurus unfolds itself from the pages of the book, it requires the Librarian to contain the monster and reclaim the book for the Library of Doom.

Slate is a Cliffhanger, a page who retreives books from the skyscraper tall shelves of the Library of Doom, but when he opens a particular book located in the forbidden Black Shelves he releases the evil Scrawler, who defaces him--and only with the help of the blind Blue Librarian can he correct his mistake.

Hidden in the roots of the Word Tree is a single book, so evil it can drain the life from the Librarian, and the Collector has come to steal it--so it is up to the Diamond Page to find a way to defeat him and use the power of the last word to restore the Librarian.

Ropa dropped out of school to become a ghost talker, and she now speaks to Edinburgh's dead - carrying messages to the living - but when she learns someone is bewitching children she investigates and discovers an occult library, a taste for hidden magic, and a wealth of Edinburgh's dark secrets.