How do I maximize my chances of winning on Book of Oz?
You do not control the outcomes, but you can control your approach. Start with a bankroll that allows you to spin enough times to potentially trigger the bonus round multiple times. Bet an amount that is comfortable for that budget. Since the free spins feature holds all the big potential, your strategy is really about staying in the game long enough to see it. Keep in mind, every result is random. https://en.wikipedia.org/wiki/Casino_Helsinki