Suggestions about My experience books written by Bibin John

Plz put your suggestions and comments about books written by me. All of my books are freely available and you can download it from yahoo group-booksbybibin. I am aiming these books mainly for newbies to robotics,parallel port interfacing and avr microcontrollers.
Here are my books
1. MY EXPERIENCE IN AUTONOMOUS ROBOTICS
2. MY EXPERIENCE IN PARALLEL PORT INTERFACING
3. MY EXPERIENCE IN PROGRAMMIGN AVR MICROCONTROLLER IN C USING WINAVR/AVRGCC