J. S. Bach - The Well-Tempered Clavier: Books I and II, Complete

Here is an affordable edition of the complete 48 preludes and fugues in all major and minor keys. Reprinted from the authoritative Bach-Gesellschaft edition, the book also features handy explanation of ornaments in English plus tempo indications and music corrections. "His art was of an encyclopedic nature." Ñ Grove's Dictionary of Music and Musicians.
Reprint of the Bach-Gesellschaft, Leipzig, Vol. 14, 1866 edition.