The Princess and the Goblin by George MacDonald is a book that now exists in the Public Domain. This means that you can find and download it for free on websites like Project Gutenberg (see http://www.gutenberg.org/ebooks/708). You can also, if you are a person like me, read this book online without breaking any copyright laws.

My podcast of this book is here: https://anchor.fm/publicdomainharmless