The 4% universe : dark matter, dark energy, and the race to discover the rest of reality / Richard Panek.

Prologue -- Part one: More than meets the eye (1. Let
there be light ; 2. What's out there ; 3. Choosing halos)
-- Part two: Lo and behold (4. Getting in the game ; 5.
Staying in the game ; 6. The game) -- Part three: The face
of the deep (7. The Flat Universe Society ; 8. Hello,
lambda ; 9. The tooth fairy twice) -- Part four: Less than
meets the eye (10. The curse of the bambino ; 11. The
thing ; 12. Must come down) -- Epilogue.

"Over the past few decades, a handful of scientists have been racing to explain a disturbing aspect of our [Universe]: only 4% of it consists of the matter that makes up you, me, our books, and every star and planet. The rest of the [Universe] is completely unknown. ... Panek tells the ... story of the quest to unlock the secrets of "dark matter" and the even stranger substance known as "dark energy", which comprise a startling 96% of existence. These are perhaps the greatest mysteries remaining in science, and solving them will reshape our understanding of the [Universe] and our place in it. ..."--Back cover.