| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Speak Czech Badly! But Speak It Today!: Say what you want in a matter of minutes with the Czech Language Brain! | 978-0-692-43683-7 (0-692-43683-9) | 2015 |
| The Six Power Moves of Chess, 3rd Edition: The Missing Key to Finding Good Chess Moves From Any Position! | 978-0-692-43684-4 (0-692-43684-7) | 2015 |
G. K. · W G · W. K. · William G. · William K.