Friends, Elisa kindly asked me to note when Stephen and my Nyāyasūtra volume was available for purchase (and not just preorder). It is now. Thanks, Elisa. If anyone is interested, you can find it here: https://www.hackettpublishing.com/philosophy/the-nyaya-sutra
Hackett has $4.00 examination copies available for those who want to glance at it in consideration of using it for teaching.