I am looking for a book that is regarded as the 'classics' of the field.
For example,
- Algebraic Number theory - Cassels Frohlich
- Complex analysis - Ahlfors
- Category Theory - MacLane
- Topology - Munkres
What are the classical books of other fields such as fourier analysis, set theory, or differential equation?
I am making a comprehensive list of mathematical classics, so the book of any field is welcomed.