| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Karel++: A Gentle Introduction to the Art of Object-Oriented Programming | 978-0-471-13809-9 | 1996 | Joseph Bergin · Mark Stehlik · Jim Roberts |
| Karel Robot 2E | 978-0-471-59725-4 | 1995 | |
| Karel the Robot | 978-0-471-11733-9 | 1994 | Jim Roberts · Mark Stehlik |
| Karel the Robot: A Gentle Introduction to the Art of Programming | 978-0-471-08928-5 | 1994 | |
R. E. · R. P. · R Pattis · Richard E. · Richard P. · Richard Pattis