Hi
Definitely worth purchasing. The pages have a plastic/gloss to them so dew doesn't settle on it. Each chapter is a particular particular time of year, evening - May, midnight - June/July, early morning - August, these are examples only. Then map 1 of that section is the North Pole through to map 10 which is the South Pole. All the Constellations and Messier objects have their own index as do Planetary Nebula, Nebula, Open Clusters, Globs and Galaxies. Dark nebulae are also shown on the individual maps as are all the DSOs in that region.
It is a small book so very manageable at the eyepiece but with tons of information. My biggest problem is taking my reading glasses on and off to observe and see what's next
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Wayne