In light of the List of Interesting Math Blogs I thought it would benefit the community if we have a list of textbooks for specific topics.
Trusted users and/or I will edit this post depending on the answers. Please try to include the textbook name, the field it relates too, the author and if you want, give it a rating. I am not sure about how the rating works but lets say 5 is something a first year mathematics student needs while 1 is for high school and 10 is for advanced levels. If you can think of a better rating system, I am all ears.
I will have the categories setup as following: