Our field guide to field guides idea as always: for each thing you are actually doing, one guide to throw in the pack and one to keep on the shelf. What is different about the sky is that the pack guide has to work in the dark, in your hands, without a screen ruining your night vision.
To take up the mountain? You want something that works at our latitude, and the thing we can put in your hands tonight is Night Sky (James Kavanagh, Waterford Press), a folding laminated card with the moon, the planets and the seasonal constellations, which survives being set down in wet grass. Alongside it, Constellation Finder (Dorcas Miller) is a better teacher: it walks you through the patterns rather than just labeling them, and it is small enough to forget you are carrying. (The classic answer here is a planisphere — a rotating star wheel set for 40–50° north, which is exactly us at 48.1. Ours is on order; ask and we will tell you where it stands.)
To keep by the chair? NightWatch (Terence Dickinson) is the standard, spiral-bound so it lies flat next to a telescope, and the one we hand people who want this to be a habit. The Stars: A New Way to See Them by H. A. Rey — the same H. A. Rey, of Curious George fame — redraws the constellations so they finally look like the things they are named for. It works on adults. It works even better with kids as young as six, we can tell you from experience.
For clouds and weather? The Cloudspotter's Guide (Gavin Pretor-Pinney) is the most-loved book in this whole category — we have sold more than a hundred copies out of this store over the years — and it is less an identification manual than a reminder that looking up is pleasurable, available to anyone, and free, day or night. The Secret World of Weather (Tristan Gooley) teaches you to find the small clues: which way the leaves are turning, what a certain cloud over a particular ridge means in the next hour.
For the dark itself. The End of Night (Paul Bogard) travels from the brightest places on earth to the darkest, and will change how you feel about the light over your own driveway. Nightfaring (Megan Eaves-Egenes) is the newest addition to this genre, while Craig Childs’ The Wild Dark (Torrey House) offers the most Western-centric perspective.
If you only buy one: The Weather of the Pacific Northwest by Cliff Mass. Here is the one that explains why the rain shadow exists, what the summer smoke is doing and where it comes from, and much more. The second edition added chapters on wildfire. There is no book about the Olympic rain shadow; this is the chapter that stands in for one, and it is worth the whole volume.
The bonus pick is The Starship and the Canoe by Kenneth Brower: Freeman Dyson designing spacecraft while his son George builds a kayak and disappears into the coastal channels north of here. Sky and saltwater in the same book.