Chaim Gingold

Discover how Earth works through play! Earth Primer is a science book for playful people. Visit volcanoes, glaciers, sand dunes. Play with them, look …

"earth-shaking devastation with perfect-pitch in every frantic thumb-press." -- boingboing "a piece of genius...something to make you smile" -- diygam …

"Gingold wastes no time in conjuring up level after level of deviously complex and awesomely rewarding puzzles that are precisely what I'd hoped for a …