Maxwell has quite a bit of of hydrocarbon data, obviously from the title. Also it has a lot charts, correlations, nomographs, etc. necessary for sizing heat exchangers, evaluating heaters and the like. If you're in a gas plant I imagine you could some use out of it.
Branan's book is "Rules of Thumb for Chemical Engineers". It does have quite a few little nuggets in it that most engineers amass over the course of a career in one place.