It's very rare for me to pay for an ap, and I wish I didn't with this one. The book has so much more information, games to play, and insight- even if the content is slightly older and not as "up to date." Why this ap makes you pay for in ap purchases on top of the first purchase for more information is beyond me, given if you've already paid and aren't impressed, what makes them think you'd pay more for "extras". Just charge the $8 up front (or even $10) and give all the information!