One could write volumes in answering that question

Do you know of any on the subject? I've started reading "The Sovereignty of God" by A.W. Pink, but am not sure if that answers the question in detail?

Adam did the transgressing and that freely and thus God is not culpable for Adam's sin.

That just brings me back to one of my original questions...God planned a sin, but because he didn't actually do it he is not culpable? (Obviously he is God anyway so can't be culpable , but...)

Again, the answer is a difficult one but only in its acceptance by the human mind which is by nature at enmity with God and His perfect ways.

I suppose one can't expect to understand God while one has a corrupted mind....One day I hope to!