Herb & spices that go together

I also recommend "The Flavor Thesaurus" by by Niki Segnit - lots of obvious and also non-obvious suggestions of flavour combinations. One of my favourites is cardamom and saffron, which does indeed feature in there. Sounds odd, tastes great.

http://www.amazon.com/Flavor-Thesaurus-Compendium-Pairings-Creative/dp/160819874X/ref=sr_1_1?s=books&ie=UTF8&qid=1397661027&sr=1-1&keywords=flavour+thesaurus

Thanks, LindsChristine! Who knew Ras el-Hanout used to sometimes contain Spanish Fly? ;)

I second the Flavor Bible, but I also like this roundup of traditional spice mixes from the Kitchn:
http://www.thekitchn.com/spice-mixes-189368

You want The Flavor Bible: http://www.amazon.com/The-Flavor-Bible-Creativity-Imaginative/dp/0316118400