Its initial success, and the success of the 1902 Broadway musical which Baum adapted from his original story, led to Baum's writing thirteen additional Oz books. The original book has been in the public domain in the US since 1956.
Mental illness or insanity of your spouse is one such reason or grounds for divorce. In most states, the grounds of mental illness is grouped with other fault-based grounds for divorce. A few other states include mental illness within no-fault divorce laws. Find out the basics about mental illness or insanity as a reason for divorce, and what it could mean in your divorce.
You can get a divorce from your wife, even if she is pregnant. The court may provide alimony for your pregnant wife, but you can get a divorce. I suggest you consult with a local Family Law attorney to discuss the case in greater detail and learn all of your rights and options.