You can find maps, glossaries, excerpts, and plenty of other information about Victoria Strauss‘ books at her 
The Arm of the Stone by Victoria Strauss
The world has been torn asunder. Originally held together by disciplines of mind and hand, devotees of the powers of the mind have been pushed aside by the technological innovations of the devotees of hand power. As belief in the power of magic fades, the last enclaves of magic users simply disappear. But they are not actually gone. They have formed a second world, accessible only by a few Gates that bind the two worlds together. This new world is held together by the power of the Stone,
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Do it! One of the best things I've read in recent years.
This reminds me. I want to read Addie LaRue.