G. K. · Grzegorz K. Witkowski · W G · W. K.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Grunt to bunt | 978-83-60157-62-6 (83-60157-62-6) | 2011 |
| Grunt to Bunt. Tom 2 | 978-83-60157-66-4 (83-60157-66-9) | 2012 |
| Grunt to bunt tom 3 | 978-83-60157-82-4 (83-60157-82-0) | 2013 |