I have not read these books of Suvarov but I have heard several historians like GlatzDavid Glantz scoff at his works. While I would not put anything past Stalin from a moral point of view, he was no fool and it would have been foolish for him to attack in 1941.
Why? The army was in chaos by the purges in 1938 and from its terrible showing versus Finland. Reforms were in progress but not completed.
There were a number of changes in equipment going into effect that were partly complete. Waiting would have allowed these changes to take place smoothly.
The final reason was that the Soviets well knew there were plenty of forces in the area waiting if a Soviet attack occurred. Unlike Poland and Finland, there was no chance of an easy win.