  Commentaries and textbooks are not the only types of texts used for interpreting, discussing, defending, adapting and transforming the doctrines of Aristotle (and his commentators) in the Renaissance. Specialized treatises cover a wide range of subjects: on the immortality of the soul, on innate heat, on the agent sense, on the regressus, on vapour, on rhetoric imitation, ….  These treatises often treat a certain subject more or less for its own sake, and not just in order to find out what was Aristotle’s opinion on it—though the author will often settle for a position that he believes to be the position of Aristotle.