It's a powerful Achilleos cover, and I'm glad to see it in use again on the present edition. The book has one of Terrance Dicks's more obvious and memorable rewrites, where Colonel Lethbridge-Stewart and the Doctor's meeting occurs as an incident in the book when it wasn't seen on screen. The Yeti and the Intelligence are far more crushing in this book than in Doctor Who and the Abominable Snowmen, I found.