Syllabus/achievement requirements
As a main reference we use
[D] B. Driver "Analysis tools with examples"
For the last part on harmonic analysis we use
[W] T. Wolff "Lectures on harmonic analysis"
Here are some other options:
[P] G. Pedersen "Analysis now"
[F] G. Folland "Real analysis"
[MDW] J. McDonald, N. Weiss "A course in real analysis"
[KF] A. Kolmogorov, S. Fomin "Elements of the theory of functions and functional analysis"
Syllabus:
Fundamental principles of functional analysis ([D]: 25.1-25.3)
Product measures, Fubini-Tonelli theorem ([D]: 18.4, 20.1, 32.9)
Modes of convergence, Egorov theorem ([D]: 21.2)
Radon-Nikodym derivative and duals of Lp-spaces ([D]: 24.1)
Complex and signed measures ([D]: 24.2-24.3)
Riesz-Markov theorem ([D]: 28.2, 31.5)
Lebesgue differentiation theorem ([D]: 30.1-30.2)
Absolutely continuous functions ([D]: 30.4)
Haar measure ([F]: 11.1 or this)
Convolution, Fourier transform, Plancherel theorem ([W]: pp. 1-8, 13-18)