1. A subset of Spira's sentient races are the "unsent", the strong-willed spirits of the dead that remain in corporeal form.

2. Creeps is told through two distinct narrative styles: unsent, heartfelt letters that Wayne Pumphrey writes to individuals (and sometimes locations), and third person narration

3. In his later (unsent) letters to Russian progressive Vera Zasulich he advised that she need have no fear of the term archaic because the Contemporaneity of capital could be combined with the still existing Russian commune formed in an indeterminate distant past to produce national wealth and avoid the disabling “vicissitudes” of capitalism.