Though the content was lost to memory, the cover was still visible to my mind's eye !
Curiosity led me to find an online version of the original that can be read here:
You Can Trust the Communists (to be Communists)
David Noebel, of Summit Ministries (”Understanding the Times”) did an update (”You can STILL trust the communists to be communists”), but he stated in the fwd that he didn’t have to update much, it was all still very true.