I purchased the book and downloaded the PDF. How do I print a few pages from the book for my son to work from, and the answer key for me?

Hi Scott,

     The PDF book itself isn't printable due to licensing restrictions, however, you can print out all the original worksheets here: http://www.aplusphysics.com/courses/regents/worksheets/ws_index.html.  The answer key is only available in electronic form.

Where can I find the book to download? I already purchased it.

Hi Myua,

     It's in the download section -- the previous "buy" button turns to a "download" button after you complete the purchase.  To save you the trouble, however, I also e-mailed you the file.