First, the book is called:
Rhacodactylus: The Complete Guide to their Selection and Care
by Philippe de Vosjoli, Frank East, and Allen Repashy
Just google it, you shouldn't have any problems.
As for the cage size, as they get bigger, you might want to try something a little wider. Mine like to jump around, and that might not provide the mobility they need. I don't know, just see how it works. I have an aquarium for two which is like a double tall 20 gallon long (40 gallons?) which is perfect, and sold for $20. As for devil's ivy, i have never heard of it. You might want to consider plants like pothos, which are known to be gecko-safe. I have heard rumors that bamboo is actually toxic as well, so be carefull. Regarding the tp tubes, I would suggest getting onto a site like blackjungle.com for cork rounds, which may last longer (also, they have a bunch of other great plants and supplies much cheaper than most retail stores). I hope this helps. If you have any questions, feel free to email me.
Ian White
iwhite@ix.netcom.com
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