MITCHELL, S.D. — Evan Anderson, 11, is busy working on his second adventure mystery novel. Yeah. He's 11, and he's already written a book. After publishing "The Adventures of Waffles the Cow Detective — The Kidnapping of Chris P. Bacon" in June, the L.B. Williams Elementary student has already started to work on the next volume of his mystery series. "After my first book was done, I felt like I had to make another sequel and have started writing again and am in about 22 pages on the next volume," Anderson said Thursday morning, Oct. 4.