There are different ways to approach controlling dreams. A method that does not require lucidity is predetermination: selecting the setting or topic of the dream prior to sleep. This is akin to the idea of "dream incubation" in which a person works to induce a dream about an important topic in order to answer a question or resolve a conflict. In her book, Creative Dreaming, Patricia Garfield presents some evidence that motivated people can choose to dream about desired topics. Post-hypnotic suggestions have also been employed in attempts to elicit particular dream topics, again with some success, as described by Charles Tart in his essay in Conscious Mind, Sleeping Brain, edited by Gackenbach and LaBerge (1988). Success with creating a particular dream setting, however, does not imply the ability to control the sequence of events in the dream.