I received my copy today. This is a fascinating book! A lot of great information, well illustrated. This book has everything from the ridiculous to the sublime!
For instance: What's a Rafaelyants Toorbolyot?
Answer: It's the Soviet version of the "Flying Bedstead"!
Other aircraft include the Mig-21 "Analogue" to test the Tu-144's wing shape, avionics testbeds with lots of bumps and humps, and a bunch of Tu-4 engine testbeds. Also, experiments in aerial refueling, ejection seats and VTOL concepts.