Well don't forget to read the part where I split it into three tasks - the web part, the game engine part, and the game design part. For game design, I highly recommend A Theory of Fun for Game Design [1] and the column Making Magic by the head designer for Magic: The Gathering[2].

[1] http://www.amazon.com/Theory-Fun-Game-Design-ebook/dp/B004D4... only $4 on Kindle or $12 on paper

[2] Look for the ones he gives 4 and 5 stars. WARNING: Lots of reading