Based on snippets posted online, the authors and publishers of this book should be deeply ashamed of themselves. The "Risks" sections of various Common Lisp functions are complete gibberish — for instance warning about wildcard characters in filenames when discussing the IMPORT function which has nothing to do with filenames. But that's just one example of many. Basically nothing of what I've seen that they say about the "Risks" associated with Common Lisp makes any sense at all.