Home › Authors › Mark Christopher 👤 Mark Christopher 5 books Books by Mark Christopher Adventures of Carlos and Pumpkin 2020 Double Your Small Business Inc Double Your Small Business Income in 7 Days Without Increasing Sales 2013 Get a Quality China Manufactue Get a Quality China Manufactuer Cheap and Fast 2013 Get on the Shelf Get on the Shelf 2012 Invention Bible Invention Bible 2012