Write your book into a text document on your computer.
Download and install a free PDF printing program such as CutePDF.
Open the text file containing your book and click "File" and then "Print" to open the Print dialogue.
Find where the program allows you to change which printer you're using and change your active printer to the CutePDF document printer. Depending on your text editor, you may or may not have to click on "Printer Properties" in order to change your printer.
Select a name for your new PDF and choose a path where you would like it to be saved. Hit "Go" and wait while the program creates a PDF file from your original text document.
Insert a blank CD into your computer's recordable drive and open your CD burning software. If you do not already have CD burning software, you can download a freeware CD burning software program such as Final Burner Free.
Use your CD burning software to burn your PDF file onto a CD.