I have 3 books so far. They are:
Awakening on the Dragon. (2005)
Indo Dragon 1 (2006)
Indo Dragon 3 (2007)
My favourite is Awakening of the Dragon since the photos are nicer because of the print quality.
As for information, Awakening of the Dragon is a book on farms found in Singapore and therefore might be more interesting to some of you since in Canada, Aros come (used to come) mostly from QianHu,Wanhu, Panda and DFI. It also covers popular LFS in Singapore and some crazy hobbyists.
Indo Dragon as the name implies are farms from Indonesia. I have already read the first one and is a good reference if you plan to buy aros from there. The second and third one again cover more different farms from Indonesia. The format is fairly similar with part of the book allocated to LFS in Indonesia and some crazy hobbyists there (picture of one of my favourite common tank is found on this link)
http://www.indodragon.com/forum/f8/if-u-not-klik-u-will-regret-d-my-journey-bandung-city-2861/
In term of cost, I would recommend Awakening of the Dragon (C$80) as a start since the Indo Dragon costs over C$120 but then again someone who has a SR/XB and loves Aros can easily afford any of these books or have your wife/gf buy it for you as a Christmas/Birthday gift.
I believe the price difference in the 3 books I own was also because of when it was published. Might be a little off on the year I posted above.