Based on the hit tv show, the Librarians must find the leprechaun's treasure and prevent an evil plot in this novel from a New York Times bestseller.

There is truth to every story . . .

For millennia, the Librarians have secretly protected the world by keeping watch over dangerous magical relics. Cataloging and safeguarding everything from Excalibur to Pandora's Box, they stand between humanity and those who would use the relics for evil.

Hundreds of years ago, the fate of the world rested upon the shoulders of a clever priest and a clever librarian. The pair drove the remnants of the Serpent Brotherhood from Ireland's shore—that is, until the grave of an ancient sorceress is dug up and her remains removed.

Now, Baird and her team of plucky Librarians find themselves on a collision course with their longtime foes as they race to find a leprechaun's lost gold to prevent the Brotherhood's dark design from coming to fruition.