Tree of life
Dawkins writes beautifully, making science accessible to even the most unscientific mind, and this coupled with a strong narrative makes this an enthralling read. One can only wonder at the beauty of evolution, simple and yet incredibly complex; the creativity of nature as step by step led by the evolutionary drive for improvement, it develops a myriad of eyes to suit every creature, the ability (for land animals) to make oxygen their friend, and a plethora of weaponry and aids to survive in the most hostile of environments.
Along the way through this journey of 4 billion years there are frequent, and entertaining asides, in Dawkins' inimitable style - from the link between cystic fibrosis and cholera (my personal "I never knew that" moment in my journey through this book) to how the family tree of a louse can tell you when humans invented clothing. Fascinating stuff.
As readable as any novel this is a wonderful introduction to evolution. It is, as the author himself says, quite a trip.