I have written the Go arm64 and sparc64 compilers, as well as several other proprietary production compilers for several languages.
The Dragon Book is the best, for sure, and in my opinion essential material. Many people find its style too dry. It's basically a reference, not a tutorial. If you want something more hands on, I recommend this book about LCC[1]. It covers LCC, which is a C compiler. It's not a generic book about writing compilers, but I believe to be very useful anyway because it's very hands on. The current version of LCC is here[2]: Not sure if you can regenerate the book out of the current code or not (LCC is written in literate programming style, and the book used to be just the literate part).
[1] A Retargetable C Compiler: Design and Implementation (Addison-Wesley, 1995, ISBN 0-8053-1670-1)