In the last month or so I've had a really good look at the three new books, published by Oxford University Press, that have been written specifically for the new 2012 syllabus: HL, SL and Studies books. I imagine that many school will continue using their existing books. However, if you are restocking I would thoroughly recommend these books. They are attractively presented in a style very similar to Edexcel's texts, and the GDC examples are based on the the TI-Nspire. There's also a CD which, among other things, contains the entire book and PDFs for those unwilling to give up their Casio or TI-84. On a separate topic, now that Further Maths is a HL option how many schools out there are going to offer it? I imagine that quite a few of the more mathematically able students would be very happy to trade in their biology or chemistry HL for a second one in maths.