I’ve tried to make this book as friendly as possible to beginners. I welcome beginners the most because they have so much to discover! But beginners may also find this book challenging. We will be covering many new concepts, and essentially learning two new programming languages at once.

After a couple of engagements like this you may decide that you are not a programmer, or don’t really like programming, or that you just don’t get it. You may have thought that you once enjoyed the idea of building your own programming language, but now you have realised that it is too abstract and you don’t care any more. You are now concerned with your other passions, and any insight that may have been playful, joyful or interesting will now have become an obstacle.