Question Author
If you put the books into a collection, then go into the collection and tap on the middle symbol top right, you can rearrange the order they are in
Tried that as well, woof. It only sorts them by Author, Most recent and Title (I should have said it's a mk. 1 Kindle). It's not too much of a problem, and I've added a note to my iPod Touch with all the series in the right order, so I'll refer to that when I get round to reading them - quite looking forward to them too!