E.J. Gold's Parallel Worlds Explored details his research into Beta-Blockers, devices using crystal radio technology to access parallel universes.

The text describes the development of various Beta-Blocker devices, including the Spirit Radio and Parallel World Induction Device, and explores their theoretical underpinnings. It also discusses related concepts like brainwave entrainment, jaunting, and the nature of consciousness in a multiverse. The author's experiences and those of his experimental volunteers with these devices are documented, along with testimonials highlighting their effects.

Finally, promotional materials advertise the Beta-Blockers and related products.