In the "Sempre semplice" collection, players might be misled by the sweeping "sempre" (always), for the twelve Organ Pieces op. 142 (I) contain some passages that are far from being "semplice." A number of pieces from this collection were derived from harmonium works, whereby Karg-Elert sometimes made quite radical changes when he revised the more than 20-year-old pieces, adding effects that were more idiomatic to the organ. In addition to being wonderfully suited for organ practice and teaching, this collection will also help organists discover a previously little-known side to Karg-Elert.

"The ongoing Karg-Elert edition has the same virtues as the B&H editions of older repertoires: clean computer print on off-white paper, with informative preface and editorial notes, a reliable and easily grasped musical text and a keen regard for Karg-Elert's precise and detailed notation." (Organ Yearbook 2008)