My book was very good.
The theory it suggests is that it was more people's understanding of God that we see changing throughout the Bible. I know He is quoted as saying some pretty angry things, but in those days it was all that would convince people to listen to Him. He got so angry about the worship of other Gods because He wanted His people to understand that there WERE no other Gods, not, as they sometimes supposed, that He was one of many and they should worship Him only in the right place/ about the right subject. He showed His power to one nation in the beginning, but slowly they came to understand that He was for everybody. Many of the prophets are discussed in this book, showing what particular message they brought, until you come to Jesus who finally makes it clear that now everybody must come to kow God's love and forgiveness. So basically, God tried to do it in a way the people wold understand. :wink:
The book was very basic and didn't go in to detail, but it made the idea interesting and more plausible than I've just made it. I will try again some time. In the mean time I'm going to have to ask you to try and make sense of my first attempt.