Reach down and find a grain of sand. Pick it up and hold it lightly between your thumb and fore finger. Hold that out at arms length. Swing it up to the sky. OK how many galaxies are in the sky cover by that grain of sand? Well according to the Hubble Ultra Deep Field photograph 10,000. Reading John Gribbin's book Galaxies: A Very Short Introduction can make you feel pretty mediocre. That's because you should! John Gribbin explains the scientific principle that says you should! His book is a great at explaining the complex and mediocrity of our galaxy to the layman. It explains everything about galaxies. Starting with the discover of our galaxy and the other to to the theories of how they will end. With eight chapters in a 3 by 5 inch binding this book covers the most complex questions facing Astronomy today. What is Dark Matter, Dark Energy? Was the lambda constant Einstein’s biggest mistake or not? How will the Universe end; Big Crunch, Slow Fade, or Big Rip. If you want an understanding all of these things but don't have the advance degree in science this is the book to read. ( )