Dang it! If I could get my buds to start coming on this board!
Good book, off the top of my head: Dr. Scott's Knee Book - this guy is wonderful and explains terms, anatomy, treatment, and recovery in easy to understand language. I used it when I first went into workers comp case managment.
Oh! Go to the AMA's website, there they have links to the national specialty societies - Ortho surgeons, Neuro surgeons, Fook and Ankle surgeons, etc. Usually the specialty websites have great info on conditions you're going to see a lot in your new setting.
Ask if part of your orientation can be scrubbing in or observing a total hip being done, any type of arthroplasty to give you an total picture in what's being done and how.
Different ortho's have quirks on how they want their post-ops treated. Once you get to know them and which one's are nurse-friendly, don't be afraid to ask questions.
In no time you'll be able to tell US about tibial plateau fractures, total hips, total knees, laminectomy's, fusions, halo's, traction, bone stimulators, cages, etc.
You'll do great, and know we're here to cheer you on!