Why would a perfect God make such an imperfect book?

I am talking about The Bible. That is "God's Word", right? Since God can do anything and everything is God's will why did He want His Word to be so ambiguous, argued about and difficult to interpret (scholars spend their lives doing it)? Why didn't he make it nice and clear? A Magic Book that automatically updated to match the language, time and level of the reader seems like it would have worked nicely.