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I find this quite small manual means, the cards that represent the "constellations" groups are poorly organized and do not allow to quickly move from a constellation compared to another hotel "lower right" for example. The comments are interesting but very brief ..
If you want to recognize the constellation it is far better to buy a chart that will give a better overall vision to orient themselves in the constellations. Free software as "Stellarium" are a thousand times more effective for you to find your way easily in the sky ....