The experience of Job is seen by most scholars to have happened before Moses wrote the Pentateuch. Hence it's introduction at this point in the chronological reading of the Bible.
Job - Most of this book is poetry, but it is not fiction. It records the encounters with Job and Satan (1-2); Job and his friends (3-37); and Job and the Lord (38-42). The question often asked is, "Why do the righteous suffer?" But another good question is whether we serve the Lord just for His blessings, or do we trust Him even if the blessings don't come?
Job 1 - Job knew nothing about Satan's challenge to God. Job was righteous because of his faith in God and God allowed his faith to be tested.
Job 2 - Job did not curse God, but he said, "Blessed be the name of the Lord." Satan will never let up. He will attack when a believer is at his/her weakest point.
Job 3 - Job asks the question, "Why?" many times. He would learn to trust God's promises, even without His explanations.
Job 4 - "Friends" obviously don't see you or your circumstances the way God does. Friends tend to judge and assume we don't practice what we preach.
Job 5 - Eliphaz tells Job to submit to God's correction and then he might be blessed. Was he saying that Job only served the Lord to get God's blessings?