Thank you again for your hard work on the index, I am thrilled with it. I’ll certainly be back in touch when the next book needs one! 
University of Oxford academic, Cambridge University Press

I've just looked through the index and let me say a HUGE THANK YOU. I've been so impressed by your professionalism and intellectual clarity. You've done an excellent job.
Durham University academic, Cambridge University Press

I have now looked over the index carefully, and am very happy with it — it is really comprehensive, and fully meets my expectations, so thank you very much for doing this. 
University of Oxford academic, Oxford University Press