Only the first couple chapters deal with lexing and parsing. The Dragon book covers a lot more than just the syntax analysis: semantic analysis, type checking,

Only the first couple chapters deal with lexing and parsing. The Dragon book covers a lot more than just the syntax analysis: semantic analysis, type checking, run time environment design, intermediate language design, code generation, code optimization, and more. It doesn't have the newer stuff like JIT or Hindley–Milner type system, but those can be picked up separately with reading the papers. OP asks for resource to build a language. The Dragon book is a very good book to cover the whole process.