I seriously doubt that any insecticide treatment of the house will damage comic books.
Public Service Announcement:
On the other hand, most flea infestations can be controlled by treating household pets with a quality product such as Frontline, Advantage or Capstar.
Fleas have to take a blood meal from an animal in order to reproduce. If they are unable to do so, they will not reproduce. Treating pets in the household should accomplish this.
In general, treating all household pets, washing their bedding and vacuuming carpeting, etc. (being sure to throw out the vacuum bag afterward) is sufficient to take care of most flea problems.
End PSA