I found a interesting math book:

Able's Theorem in Problems and Solutions
  Based on the lectures of Professor V.I. Arnold

by V.B. Alekseev

Arnold had given to Moscow High School children in 1963-1964
a (half year long) course of lectures, containing the topological
proof of the Abel theorem.

Starting from the definition of complex numbers and from geometry,
the students were led to Riemannian surfaces in a sequence of elementary
problems. Next came the basic topological notions, such as the fundamental
group, coverings, ramified coverings, heir monodromies, braids, etc.
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修改:MarioSister FROM 203.218.76.*
FROM 203.218.76.*