Dilbert Books Set of 4 Graphic Novels Comedy

Set of 4 Dilbert books. “Dogbert’s Top Secret Management Handbook” (hard cover w/ dust jacket), “I’m Not Anti-Business, I’m Anti-Idiot”(paperback), “Words You Don’t Want To Hear During Your Annual Performance Review (paperback), Still Pumped From Using The Mouse(paperback). All in like new condition except “Still Pumped From Using The Mouse” and the pages have some waffling at the bottom like it got damp.