Sadly, as they get older, some books go out of print and it is very difficult to get hold of them any more.
Because we have written many books over many years, some of our series have gone out of print. That’s why we brought many of them back as eBooks for the iPod Touch and iPhone.
If you want a printed copy, the best place to look are second-hand book sites on the web (just type the title of whichever book you are looking for into a search engine and see what comes up!).
The other place to try is the local library – and you will be able to borrow the books for FREE!