Einstein’s Telescope by Evalyn Gates is probably the best random choice I’ve made of a book since I picked up Jared Diamond’s Guns, Germs and Steel 12 years ago. Wow! I’d heard about gravity lensing, dark matter, dark energy, MACHO and WIMPs, but I’d never seen them discussed in-depth in a readable format before. I’m learning more with each page here than I do in most entire books (What Would Google Do, being a more typical example). This is good science, extremely well done. Highly recommended.