A furniture joint, comprising: a first piece of wood comprising a central groove running across a first axis along the length of the wood-piece's face, said groove milled to a depth of about half the first wood-piece's thickness; characterized in that two coin wells are positioned on a second axis on the wood-piece's face, said second axis being perpendicular to said groove; wherein said coin wells are connected by a tool-raceway, said raceway likewise running along the second axis perpendicular to said groove; wherein said coin wells are substantially mirror images of each other; and wherein said coin wells and said raceway are positioned about half as deep in the first wood-piece as is its central groove; wherein the coin wells are accessible from the central groove via a raceway slot, said slot being substantially covered by a raceway overhang; said furniture joint further comprising a second wood-piece whose edge thickness is nominally smaller than the width of the first wood-piece's central groove, such that said the second wood piece's entire edge fits into said groove; and said second wood-piece further comprising a central coin slot positioned at a height and position such that, when said second wood-piece is nestled into the central groove of said first wood piece, said central coin slot lies on the same plane-height as the plane-height of said first wood piece's raceway and at the same central position as said raceway slot, such that a coin may be placed into either of the coin wells and then subsequently pushed along said raceway to the point where the wood pieces meet, said coin thereby straddling the two wood-pieces and resting partially under said raceway overhang, so that said coin then holds the wood-pieces together, said coin thereby functioning as a plate biscuit joiner. a first piece of wood comprising a central groove running across a first axis along the length of the wood-piece's face, said groove milled to a depth of about half the first wood-piece's thickness; characterized in that two coin wells are positioned on a second axis on the wood-piece's face, said second axis being perpendicular to said groove; wherein said coin wells are connected by a tool-raceway, said raceway likewise running along the second axis perpendicular to said groove; wherein said coin wells are substantially mirror images of each other; and wherein said coin wells and said raceway are positioned about half as deep in the first wood-piece as is its central groove; wherein the coin wells are accessible from the central groove via a raceway slot, said slot being substantially covered by a raceway overhang; said furniture joint further comprising a second wood-piece whose edge thickness is nominally smaller than the width of the first wood-piece's central groove, such that said the second wood piece's entire edge fits into said groove; and said second wood-piece further comprising a central coin slot positioned at a height and position such that, when said second wood-piece is nestled into the central groove of said first wood piece, said central coin slot lies on the same plane-height as the plane-height of said first wood piece's raceway and at the same central position as said raceway slot, such that a coin may be placed into either of the coin wells and then subsequently pushed along said raceway to the point where the wood pieces meet, said coin thereby straddling the two wood-pieces and resting partially under said raceway overhang, so that said coin then holds the wood-pieces together, said coin thereby functioning as a plate biscuit joiner.