Abstract Algebraic Topology

https://www.maths.ed.ac.uk/~v1ranick/papers/maybook.pdf

https://www.math.uni-hamburg.de/home/schweigert/ss16/atskript.pdf

http://www.math.nus.edu.sg/~matwujie/ma5209.pdf

http://www.mit.edu/~sanathd/main.pdf

http://www.pdmi.ras.ru/~olegviro/topoman/e-part1.pdf

http://www.pdmi.ras.ru/~olegviro/topoman/e-part2.pdf

http://www.pdmi.ras.ru/~olegviro/topoman/e-part3.pdf