Amazon offers Sean Carroll's From Eternity to Here: The Quest for the Ultimate Theory of Time Kindle eBook for $4.99. (iTunes, Google Play, and Barnes & Noble charge the same price for their platforms.) That's $11 under the lowest price we could find for a paperback edition.

Also available is Sean Carroll's The Particle at the End of the Universe: How the Hunt for the Higgs Boson Leads Us to the Edge of a New World Kindle eBook for $5.99. (iTunes, Google Play, and Barnes & Noble charge the same again.) That's $4 under the lowest price we could find for a paperback edition.

Resident science-curious simpleton Alan B. says, "Carroll is one of the most gifted science communicators around, especially for making complex ideas (somewhat) comprehensible to scrubs like me. I snapped these deals up immediately."