They are decent resources - but in comparison to the old Marvel Universe Handbook things - the only people really interested in a bunch of this would be fans - and not certain if fans would really need this. I felt myself leafing past these - and really not stopping much. They didn't really fill in much. Could be because I kept passing over them - but even now don't feel the need to jump back in and re-try reading again. Nice to have - but certainly not much of a resource to keep returing to and re-reading. Pass.