The Hubble Telescope is back and running, after a computer glitch caused a month-long hiatus.
Perhaps timed to this occasion is the release of NASA's new edition in the "Hubble Focus" e-book series,
Hubble Focus: The Lives of Stars. "This e-book hightlights the mission's recent discoveries and observations related to the birth, evolution, and death of stars."
The photos are simply stunning.
The book is
free and is available in PDF, ePub, and mobi.
NASA has other
free downloads, also; they are available via a menu at the top of the page with the same web address as below.
Book.