Dr. Evil got shortchanged in the first one. The family dynamic between Scott and Dr. Evil - the adventures of being an evil single parent - needed to be explored. ↗
My parents would read those books to me as well but they used to make me starving when I was a kid because they were always eating ham sandwiches with the crusts off and drinking ginger beer. ↗
So they ended up turning this little twenty eight page book into the movie. And it's all about this stinky, smelly ogre who doesn't care what anybody thinks of him. ↗