I bought the Kindle version of this book, so there is no companion CD-ROM. When you go to the website recommended for download of files for the CD-ROM, you are immediately redirected to a site that will sell you the CD-ROM (a company called Delmar Cengage Learning). Lucky me, I can pay $29.99 for the online companion, and I can't get the files, source code for the programs or games, will have to go elsewhere for the Bloodshed Dev-C++ (easy enough), and won't get the "useful links." I don't give a dang at this point if this is a good book or not, I feel completely ripped by the fact that I can pay nearly double for the "companion" information than I paid for the Kindle book. Total ripoff.