We must see this with utmost clarity: according to the prologue, Job’s suffering has a very simple, not to say a grotesquely simplistic, explanation: Job is subjected to a heavenly test. This is the only reason for his suffering. God performs a cruel experiment on Job; despite the figure of the satan, it is he who is solely responsible for Job’s fate (compare 1:11 with 1:12; 2:3; see also 1:21; 2:10). The text is especially careful to show that each of the satan’s actions affecting Job is legitimized and limited by God. In 2:3, God himself admits that it was not the satan who destroyed Job, but that the satan drove God to act against Job (סות Hiphil [swt]).
There is one modification we must immediately make to this proleptic solution to the problem of Job: neither Job himself nor are his wife or friends aware of this solution. Job only knew his suffering, not the book that carries his name. The readers alone have knowledge of the true reason for the blows that befell Job; and they have been aware of this reason from the very beginning, from chapter one.— Job's Journey, pages 14–15 (emphasis original)