The second book you need for your telescope, after a good observing guide
I wasn't sure what to expect when I ordered this book. I was amazed at how well thought out the "hacks" were and the authors take the time to explain the why of the "hack" with plenty of detail. Their handling of the different topics are from the perspective of what they found works well, but they take the time to address alternate viewpoints and the relative merits of each (an example is their handling of the red-dot sight vs Telrad vs Rigel Qwikfinder debate, some very useful information there!).This is a definite "must have" book for any telescope owner (they handle dobs extremely well in this book), and is the second book you need to buy after choosing a good observing guide.