Nonogram books for e-ink tablets.

The three tablets do not share a page. A reMarkable 2 gives you 1404 by 1872 pixels at 226 ppi, a Paper Pro 1620 by 2160 at 229 ppi, and a Kindle Scribe 1860 by 2480. That is three different reading areas, and nothing bridges them except shrinking the page.

Shrinking is the part that hurts a nonogram. The clue digits beside a 20 by 20 grid are the smallest thing on the sheet, and they are the first thing to go when a PDF is scaled down to fit. So each edition is drawn at its own size: 447 by 596 points for the reMarkable 2, 509 by 679 for the Paper Pro, 446 by 595 for the Scribe.

You get all three in the download and use the one named for your device. There is no setting to change and nothing to convert.

The tablet editions are hyperlinked in both directions. Tap a puzzle in the index to jump to it, tap Answer to see the finished grid, and tap Back to land on the square you left. Every puzzle gets its own full-page solution.

That is what the page counts are for. The three single volumes run to 105 pages on a tablet, the Halloween book to 107, and the complete collection to 307. Sheets cost nothing on a screen, so the tablet editions spend them on one answer per page.

The tap targets sit away from the screen edges, so a stylus grip near the bezel does not trigger them.

Every page is pure black-and-white vector. Nothing on it is a photograph or a grey fill, so the panel is never asked to approximate a tone it cannot show. Grid lines keep their weight at the size they are read.

The puzzle needs two marks, a fill and a cross, and both go down in one stroke. The third thing you do constantly is take a mark back. Hard nonograms are solved by following an assumption until it breaks, so the erase gets as much use as the pen.

Prefer paper for some of it? The same download carries both print files, covered on printable nonogram books.