Short on time, but you’re still curious about . . . everything? I think that describes almost everyone who works in a library. 😉
DailyLit will send you installments (about 5 minutes reading time) via either email or RSS on different topics or books. You decide how frequently you want to receive them and, if you like, can get the next installment immediately when you’ve got extra time on your hands.
Public domain books are free; copyrighted books usually provide the first few installments at no charge, but then there will be a cost. Wikipedia Tours use that database to give you an overview of that subject, e.g., World Capitals, Famous Inventors.