My first microcontroller experiments were done with Arduino, but i always Could not understand That people Seemed to use the full $ 30 Arduino board in Their projects. So i wanted to know how to use the bare MCU without the board. This book is definitely not for novice people, a little bit of experience with programming is required to follow the descriptions, but I really like it so far (I'm on page 90 +/-). The author added a few pages on how to upload the C code using $ 5 ISP Programmers Which I found very useful. I really enjoy reading this book and building the projects while reading it. I can recommend this book for people who want to switch from Arduino.