Mark Twain’s most lucrative book was actually blank. Twain was a lover of scrapbooks and was often seen carrying one with him. Growing tired of working with harden paste and losing the glue, Twain set out to make a better type of scrapbook. In June of 1873, he received Patent #140245 for improvement in scrapbooks. His scrapbook pages were self-sticking. Thin strips of glue were printed on the pages to make updates neat and easy to do. Continue reading “What was Mark Twain’s most profitable book?” →