[woolybully]

Well, there's designing a pl and there's implementing a pl, and many other subquestions as well. For implementation, yes, the Dragon book is fundamental, but also look at other points of view, such as packrat parsing, or non-textual syntax. For design, wow, hmm, does the world need another programming language? If you're thinking of an OO language, look at the design space of OO languages, for example, is inheritance class-based or prototype-based. if you're looking outside OO languages, look at the crazy menagerie of languages that have been created so far: APL, Plankalkul, Toontalk.