Michael Dahl 
Dead Letters [EPUB ebook] 

Welcome to the Graveyard of Dead Letters, where evil silent letters, like the W of swords and the K of knives, are buried. Here they can do no harm. But the wicked Spellbinder has plans to revive the letters . . . and use them to create a fierce weapon that will challenge even the powerful Librarian! Uncover hidden dangers and dark mysteries with SECRETS OF THE LIBRARY OF DOOM, a page-turning chapter book series from best-selling author Michael Dahl.