Added "ag.algebraic-geometry" tag
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Where is a good place to start learning about the Grothendieck-Teichmuller group?
I've had a desire to get some sort of handle on the Grothendeick-Teichmuller group for years now, but I've always felt that I could never find a source that was introductory and readable.
The obvious candidates are Schneps's:
Do you know of an "easy" (by which I mean: well-motivated) introduction to the Grothendieck-Teichmuller group?