A quirky adventure story featuring special heroes: books! With humorous, colorful illustrations and a book agent suitability test included! They live incognito on the shelves of libraries and bookstores: the book agents! These are lively books that can talk and even walk. From their headquarters, an old antiquarian shop, they watch over their sleeping book siblings and protect the book world from any minor danger. However, an unforeseen threat looms over the book realm: the mysterious censor is wreaking havoc and reading more and more books empty. And then the leader of the book agents, Tabula Smaragdina, is kidnapped! Now, it’s up to three chaotic young book agents to save Smaragdina and all the books in the world from being forgotten!.