There are a number of places to get Aqualog books. I for one sell = them.You can check my page at "www.ruralamerica.com/~mikee" or you can = check out Anchor Bay Aquaruims web page. John F Kuhns also has a page = located in the petsforum group. I can't remember there page addresses = but with a little bit of searching they can be found. =20 I also have all of the supplements on hand that belong to the books. Mike Evans