Raymond Bisha introduces recordings of J. S. Bach’s cello suites, transcribed for guitar and performed by Jeffrey McFadden. Bach himself made arrangements of other composers’ works, as well his own, recycling them for new uses, a practice that continues with these two new volumes. Pablo Casals (1876–1973), the eminent cellist who was pivotal in resurrecting the practice of giving complete performances of the original suites, summed up their importance: “They are the very essence of Bach; and Bach is the very essence of music.”