Common LISP: The Language by Guy L. Steele (Second Edition, Digital Press, 1990) This book, known as "CLtL2", is still the de-facto LISP reference for many people. It includes a huge index (in fact, several indices), with numerous crazy entries like "Teenage Mutant Ninja Turtles" and many other seemingly unrelated subjects. These, however, are real references to actual mentions in the text (most often, in the sample code fragments). The index also includes an entry for kludges, pointing to pages 1-971 -- namely, the whole book.