I recently bought an iriver ebook reader but it doesn't support chm files.

I have bought a bunch of O'Reilly books and with them have the soft copy as well.

Some books convert quite well using calibre.

However, there is one book I have that just won't convert.

So I used HH to decompile it and now I have a bunch of html files. These html files contain references to images in folders.

How can I now join them all into a single document which Calibre can read and properly convert into an epub or am I going about this the wrong way?

I've read this question but it removes the images and the images are quite important to the content.