Everything Easy Large-Print Crosswords Book, Volume 9Charles Timmerman · First published 2022Open the Tome
Everything Big Book of Easy Large-Print CrosswordsCharles Timmerman · First published 2021Open the Tome
Introduction to Computer Science Using PythonCharles Dierbach, Hugo Kubinyi, Raimund Mannhold, Hendrik Timmerman · First published 2013Open the Tome