http://www.academyonline.org/
http://www.nann.org/i4a/pages/index.cfm?pageid=1
Join either one of these groups, or subscribe to their journals. (I personally recommend
Neonatal Network.) That way, you'll get new info regularly.
Or you can see if there's a NANN chapter in your area.
You should probably wait a while before investing in more books to see what you want. You might want something from parents point of view or something on breastfeeding, or developmental? Who knows at this pt.?
Congratulations on your new job!