It's the original Zelda's 36th anniversary in Japan, so I thought I'd put in a good word that was a bit too long in coming. I picked up Philip Summers' The Legend of Zelda Hand-Drawn Game Guide on video game news editor Shaun Musgrave's Twitter recommendation, back when the PDF was a cool dollar.
The creators set their sights on producing a physical edition of this as well as guides to Metroid, Ninja Gaiden, and Contra. Then Nintendo showed up with a DMCA, which took the wind out of the sails of the entire project, physical or digital. The digital incarnation of the Zelda guide now lives, like much else, on archive.org.
It is as its says on the cover: a hand-drawn guide to The Legend of Zelda (first quest only) using illustrations only - no screenshots. It looks like you picked up someone's Moleskine. The style is, quite effectively and deliberately, evocative of the iconic Nintendo Power art of Katsuya Terada.
There's so much love put into this - not only illustration-wise, but also in functionality. The clues you get in the dungeons are scribbled on the appropriate square in the dungeon diagram. It even comes with a full-size pull-out map.
Look at that Darknut! Surely worthy of a call to Vermont!