The Gamers, 2002
which is funny enough with a good few in-jokes and some excellent plot-twist
Dorkness Rising, 2008
And then onto the more coherent, ambitious and professional
Which holds together throughput to provide a comprehensive vision of what a game looks and feels like, a lot of the time.
Again the plot is good and the twists and turns surprising
Hands of Fate, 2013
this keeps the same core of characters but switches the subject from D&D to Card-based gaming. But they keep the plot tight, the sub-plots are interwoven nicely and the twists are trade-markedly unexpected. Top yarn.
Lots of other stuff too