Good luck finding the Requisites series, especially for plastics. I looked for it 3 years ago when I was in residency and considering plastics and it was out of print then (pub 2001) and was going used for multiple hundreds of dollars. Gotta believe it would be even more now. Try the Tyres book with DVD. I liked that one quite a bit. OrbitSurg can probably answer this the best though.
i like the 'manual of oculoplastic surgery' by levine for step-by-step surgeries. but, you'll need a more detailed book if you are considering plastics.
Nerad has a new book coming out - it might be out already. I haven't seen it, but many people feel that Nerad's original book is one of the best basic overviews available. If a new version is out, I highly recommend it.