This paper considers the issues involved in the use of manuals to guide the treatment of sexual offenders. I identify problems in the use of manuals, particularly their failure to encourage satisfactorily the implementation of therapeutic skills, the restrictions they place upon the therapist's ability to address the responsivity principle, the limits to which manuals can accommodate changes as a result of new evidence and the suppression of innovation. I offer suggestions for an alternative set of strategies to ensure the integrity of treatment delivery while at the same time overcoming the problems associated with manualization. (Contains 1 figure.)