This is a very unique book. The layout of the music makes it seem as if it has 2 books in One! ie. worth the money. The first half consists of the difficult Fantasia and Fugue in a- minor, a fugue in G-Major.The strange"Little Harmonic Labyrinth" (BACH'S ONLY!)a non-tonal peice. The frollicing Fuga et G-Major"JIG",Fugue in D-Major. A concerto in G-Major(571)and the one in Es (E-flat)Major.Trios in G,c,and G. Plus the Delightful Aria in F-Major. The"SECOND BOOK" consists of 18 questionable chorale preludes by Bach.