User blog comment:Blood Reaper/Skyrim Dawnguard Trailer/@comment-4353017-20120601135725/@comment-3428817-20120601195229

It still brings up an important question. The crossbow is an entierly different weapon from the bow, so it would not work with the Archery skill tree. There are some perks in the tree that it would work with, but the others only apply to the bow. So, the question is will Bethesda add a new skill tree for the crossbow?