+1 on Farmhouse Ales it is a great book on old-time Belgian brewing. Saisons are typically light in color, highly carbonated, quite dry, and more bitter than other beligan ales. They have a tart, quenching character from the yeast, and some of the highest fermentation temps in brewing. It is also a style with great variation, so a single style guideline is tough traditionally. Try Ommegang Hennepin if you've never had one, it is a great example made in the states so it has a freshness that can be lost in the imported examples.