I really like Christian Queinnec's Lisp in Small Pieces. I read the English translation but the original is in French, Principes d'implantation de Scheme et Lis

I really like Christian Queinnec's Lisp in Small Pieces. I read the English translation but the original is in French, Principes d'implantation de Scheme et Lisp (that's actually the title of a revised edition, the first edition was called Les Langages Lisp).