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  • 2 years ago
SPI 206: How SPI Reader Robert Duff Is Building Passive Income with Books on Amazon

SPI 206: How SPI Reader Robert Duff Is Building Passive Income with Books on Amazon

I’m very excited to introduce you to another SPI listener success story. Here with me this week is Robert Duff, Ph.D., a psychologist who’s supplementing his income by selling his books on Amazon. Robert shares tips for writing, marketing, and distributing via Amazon.

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