Audio Books

I had a friend give me an audio book that is broken into many small files. When I try to listen to it, I have to manually open each file to listen. Is there any software that will open these files in order or do I have to edit the book to make one large file? The book is in a mp3 format. Thanks

Check out 1by1

Thanks for the reply, I downloaded it and it works great! I was getting awful tired of clicking on a new file every 45 seconds. BTW, my mouse says thanks too.