Hello Bob,
Here's an option to consider. It's the "First Organ Book" from Wayne Leupold Editions.
http://www.wayneleupold.com/organ-teach ... ld-ed.htmlIt's contemporary, and it contains chapters on everything - technique, registration, manuals-only, pedal skills, manuals plus pedal, trios and lots of appropriate graded repertoire. As the name suggests, it aims at players who are starting out on the organ. It assumes a basic understanding of piano/keyboard skills and the ability to read music on two staves. The book is now out in its third edition, and it just keeps getting better.
You mention the Sanger volume - it's good for repertoire but it's a bit thin in relation to the earlier stages of development. It starts you off all right but then there's a sudden mighty leap into harder stuff, with a substantial gap in between. First Organ Book fills in that gap. Also, First Organ Book is founded firmly in the traditional legato style of playing, which many players will find to be familiar territory. Some of David Sanger's fingerings - though they work - are not so straight forward as he tends to incorporate earlier styles of fingering into his suggestions.
Also from Wayne Leupold is a wonderful little volume called "Easiest Hymns". This presents a number of hymn tunes arranged in trio texture - one note per voice for two hands plus pedal. It starts out using just two pedal notes - one for each foot. The most important yet most challenging aspect of organ playing is the ability to play three independent lines simultaneously. This tiny volume gives beginners a great start into this vital skill.
http://www.wayneleupold.com/organ-teach ... d-arr.htmlThese items are only available from the Wayne Leupold webstore.
Hope this helps.
Andrew