This [1]The 2009-2014 Outlook for Wood Toilet Seats in Greater China seems to be the most reviewed book (35) at 3.3 stars, being sold for $495 USD.
[1] http://www.amazon.com/2009-2014-Outlook-Toilet-Seats-Greater...
[1] http://www.amazon.com/2009-2014-Outlook-Toilet-Seats-Greater...
Also, I didn't like the Scratch N Sniff parts.