Usborne Children's Books have put their old BASIC books online free to download. I'm puttering around with an adaptation of their listing for Dungeon of Doom from Write Your Own Fantasy Games. Here's a dungeon editor.
@Phoenix
If you google Computer and Coding Books from Usborne Publishing, you'll find the page where you can download the original books that I'm working from. Of course, since SmileBASIC is so different from the systems they describe, I've basically had to rework it from the ground up.
Usborne have updated their book listing with a note that programmers are welcome to adapt their examples to modern languages for non-commercial purposes as long as credit is given with a link back to their book listing. So it looks like I'll be sharing my version sooner or later.