Book after Kreyszig Functional Analysis

Question

I have finished the book Introductory Functional Analysis by Erwin Kreyszig and enjoyed it a lot. Wonderful book, but I feel that

1. This book did not give knowledge about $L^p$ spaces and Euclidean spaces.
2. I want to read more and modern book on normed spaces
3. I want to study applicable functional analysis

Answer 1

I would recommend

H. Brezis, Functional Analysis, Sobolev spaces and Partial Differential Equations.