Book excerpt: Now that the sale of a Picasso painting has exceeded US$100 million at auction, the forgers are extricating their bag of tricks. This fascinating collection of papers provides an eclectic coverage of the art and philatelic concerns in safeguarding the integrity of creative artists. It paints a broader swath of the problems in art authentication, including philatelic fraud.The articles represent 24 expert contributions on relevant topics pertaining to the scientific detection of forgery in art and philately.