The only way would be to sell them to a publisher and let them market them for you. But then they wouldn't really be ebooks.
Or you could become a copywriter and write ebooks for other people to sell, and just charge them for writing them.
But if you want to sell your own ebooks, you're going to have to have a website and market them. It's hard work, but there's no such thing as "get rich quick." There's no "easy" way to make a ton of money.