How To: Join / Combine MP3’s for Free on Windows

Recently I had a need to combine multiple MP3 files into one. Looking at the many different MP3 Joiner / combiners I found most of them to be bulky and just not what I was looking for in an MP3 Joiner / Combiner. After doing some digging into the Windows Command Line I came across a flag for a common function, "Copy" that intrigued me. After reading up on the flag of the Copy command in Windows I decided to give it a try with some tests. Where this came about was I copied some Books on CD to my harddrive a while ago (and the CD's have long since been scratched beyond fixing) so now I have about 15 files per chapter for 30 chapters. I would rather combine them into 30 MP3 files instead of the massive amount of files.