ACCEPTING OFFERS!!! Used Biology textbook for Class XI. Good condition, some wear and tear. Perfect for students looking for a more affordable option. Get ready to ace your exams! Class 11 book edition is 2019-20 and class 12 is 2020-21. Books are laminated and covered, so they won't fall apart. They are also highlighted and there are notes written in the margins, which can be really helpful for the prep!