Paul Marcorelles has just published a book with transcriptions of 17 original piano solos by James P. Johnson. It is available from this website, both on paper and as a pdf file.
It includes classics like "Carolina Shout", "Keep Off The Grass", "Mule Walk Stomp" (does it ring any bell?) or "The Harlem Strut".
Paul Marcorelles had previously published three books with transcriptions of Fats Waller and Willie The Lion Smith piano solos, to be found here, here and here.