Books are lightly used but in good quality - can answer in detail if required. Additional discounts can also be discussed in case of bulk purchase.

For the IB Diploma:

1. Oxford IB Study Guides (both highlighted/annotated/some pages folded, with some exercises done but not a lot)
- Biology, Originally >$200 but now $150
- Chemistry, Originally >$200 but now $150

2. NTK IBDP Biology for NEW SYLLABUS containing Practice Tests
(Barely used)
- Originally >$200 for students and even more for non-students, but now $180

3. Oxford IB Diploma Programme 2014 Edition Biology Course Companion (A.K.A. Textbook for both SL/HL, lightly used)
- Originally $450 but now $300

For additional reference:

4. Understanding Chemistry for Advanced Level, Third Edition by Lister and Renshaw
- Originally unknown, now $200