@Sam – Yep – the Achzig (80 Chorale Preludes) seems to be a staple of Lutheran organists. It’s such a staple that I’ve been given two copies from retiring organists. Once I wear out the one that gets transported back and forth to church in the music bag, I’ll have a backup.

@Nathan – It looks like our libraries are probably quite similar. I have a couple of Ore’s books (vol 1, 2, and 6) – though I don’t use them as often as the others.

I spent part of the day thinking about my “list” and this is what I’ve come up with (so far). The titles of the works are not exact – I’m going from memory.

LSB Hymnal & Liturgy Accompaniment Editions
80 Chorale Preludes
Organist’s Golden Treasury (chorale preludes)
Bach – Orgelbuchlein
Bach – Schubler Chorales
Bach – 371 Chorale Harmonizations
The Parish Organist – series
Hymnal Supplement 98 Preludes – series
Musica Sacra – 7 vol set w/ various composers from CPH
Augsburg Organ Library
Manz – need I say more?
Hildebrand – Hymn Improvisations
Songs of the Gospel – Luther & Paul Gerhardt
Burkhardt – Praise and Thanksgiving Set and seasonal improvisations.
Blersch – Hymn Introductions & Harmonizations and A Thousand Voices.
Behnke – Preludes of Praise and Advent and Lenten collections
Bender – vol 1-3 of the Commemorative Edition
Wolff – Baroque Music for Manuals

I am a fan of all of the above: Manz, Blersch, Burkhardt, Behnke, Bach. I also like Ore’s Eleven Compositions for Organ series, especially vol. 3-7.

I inherited collections of Flor Peeters and Healey Willan chorale preludes and find them quite useful. I also do use the Concordia Hymn Prelude Series and the Hymnal Supplement 98 Prelude series.

I would also recommend Hildebrand and Hobby’s Three Evening Hymns, sets 1 and 2. And you can’t forget Achzig, which has been very helpful (and which I think was reference by Sam).

That’s what I have off the top of my head. Good thoughts!

It is unfortunately out of stock at amazon right now, but it was recommended to me by my organ teacher, and I’ve found quite excellent.