I already answered about "The Art of the Metaobject Protocol" but then two more language-implementation-centric books came to mind today. 1. "Writing Compilers

I already answered about "The Art of the Metaobject Protocol" but then two more language-implementation-centric books came to mind today. 1. "Writing Compilers and Interpreters" by Ronald Mak 2. "Building an Optimizing Compiler" by Bob Morgan Morgan's book is well sought after and out of print. It's one of the few books in the field for which the print edition prices keep climbing.