I have found several nice aquarium books at thrift shops for under $1.00....they usually have a lot of species specific books-but I did find the one Betta book I listed (
different edition) for either 25 or 50 cents. You have to go and check all the time....but if your in the area it is worth a look-see....lol....got several cheap tanks that away too.....
Amazon is where I have bought most of the books I listed......
I get the AFI magazine for $13.00/year and during Christmas usually TFH will have a $10.00 off coupon and so you can get it for $18.00/year......