Coming Sunday: Paul Allen’s empire

Being a billionaire means you can act out your childhood fantasies. You can pay for a rocket flight and collect real fighter planes instead of toys. You can indulge your interests in rock and roll and science fiction.

That’s the world of Paul Allen, co-founder of Microsoft. But Allen also has invested in numerous companies, put $100 million into brain research, and has given a total of about $800 million to charity.

Read about the reclusive executive in Sunday Business.