This is a Nordic Track "iPad, iPod, e-reader, Book, CD Player and Drink Holder" that easily installs on all wooden Nordic Track Skiers (except for some of the Elite and Challenger models). It is made out of clear Lucite and very easy to install (just push it on!).

It installs over the upright tube (and rubber stopper at the end of the upright tube).  If you don't have a rubber stopper (missing, or you have a hard plastic stopper), let me know and I can provide one for $5.00 more (including shipping) if you request it with this purchase and shipment. 

The dimensions of the flat inclined surface are 9.5" wide x 7.5" high x 1-3/8" thick (the thickness of the lip on the bottom that holds books or e-readers).  It will accommodate wider books (but the ends will overhang the holder) and taller books (but it will start to encroach upon the openings for the drinks or other items if it gets much bigger than 8").

Please don't hesitate to contact me if you have any questions about it.