Mathpedia
This section should serve as a little list of English mathematical books and texts that I find interesting. When the book or text is available online, a link is included here, but this is not always the case, since good books are usually not available for free.
Alan Hatcher: Algebraic Topology (559 pages, 3.6 MiB)
Really great introduction (and far more than introduction) into algebraic topology. Although sometimes tough to read, it gives you more intuitive insight than most other books.