DROP D
one string down · everything else unchanged
Free
HALF STEP DOWN
every string down a semitone · same shapes
Free
OPEN C
the deepest of the open tunings
Free
OPEN D
the open strings are already D major
Free
OPEN G
the open strings are already G major
Free
UKULELE CHORDS
the first twelve chords · standard tuning G C E A
Free
THE VERTICAL PLANET
from the Challenger Deep to the summit of Everest · one scale, nothing compressed
$1.50
MAMMALS IN TIME
from the first synapsid to us · 320 million years on one axis
Free
VERTEBRATES IN TIME
when each group appeared · five hundred million years on one axis
Free
BASIC PHYSICS FORMULAS
fifteen formulas · every letter explained beneath it
Free
ANIMALS
the main branches — from comb jellies to chordates · who is actually related to whom
Free
THE TREE OF LIFE
who sits inside whom · where animals, fungi and plants actually are
$1.50