Packer on Penal Substitution

Given the negative reviews of The Lost Message of Jesus by Steve Chalke, I don't want to buy a copy for fear of someone or some organisation benefiting from error. (This seems to be an unfortunate by-product of the system we live in!) But I will read it if someone can lend me a copy...

However, if you have been swayed by the idea that penal substitution is a form of 'cosmic child abuse', read this by James Packer. It honestly addresses the difficulties that have been faced by those defending penal substitution. Packer puts this down to a flaw in the method of argument not in the absence of biblical data. It is a seminal work - a must read!