Topology References
Books
Intuitive
Topology by V.V. Prasolov
The
Knot Book by Colin Adams
Geometry
and Topology by Miles Reid and Balazs Szendroi
Algebraic
Topology: An Introduction by William Massey
Visual
Comples Analysis by Tristan Needham (ch 6,7)
The
Road to Reality by Roger Penrose (ch 11)
Geometry of Complex Numbers, Quaternions
and Spins by Vladimir Arnold (in Russian)
www.fetchbook.info is a place
to look for a good deal.
Web pages
Allen
Hatcher book projects
Dirac
belt trick animation
Dirac
spanner trick