Titles in Edelweiss are organized via catalogs. Generally speaking those catalogs are organized according to season, since the publishing world very much works according to seasons. The larger publishers/distributors usually create "Omnibus" catalogs, which combine all their imprints and such in to a master catalog in order to help you and your reps keep track of things.
For the most part, you'll be able to track your work each season by organizing the markups your reps send to you. Below, you'll find some links to help you find and navigate catalogs:
There are a number of tools available to help you track, or set aside, the catalogs you wish to work in:
You can also create your own custom catalogs if you like. These "Collections" can be great to share with staff or customers, or to keep track of certain types of titles if you wish: