https://letibus.itch.io/lok

The goal of each puzzle is to find Lok keywords and use their special effects to black out all cells in a grid. On top of that, you must also figure out most of the rules by yourself, deducing them from the carefully crafted sequence of more than 90 puzzles, contained in the main storyline, 2 expansions and many off-page enigmas. The result is a deep and rewarding experience with surprising twists and insights.

There’s a puzzle in front of you. You know it’s solvable. You don’t know the rules. But the fact that it’s solvable may well tell you the rules you don’t know. Apply a combination of deductive and inductive skills to solve each puzzle in the various domains of Lok.

This may well be the toughest puzzle book I’ve ever attempted, and it’s absolutely the cleverest. I was able to genuinely work out the rules in each chapter, and didn’t get permanently stuck until shockingly late in the book … which doesn’t mean that I wasn’t spending 30+ minutes each on the later puzzles.

Free PDF, spiral-bound book, or Windows/Mac digital version (in development, but playable).