PROJECT JCF

This project is planned after several considerations, to collect surviving copies of JCF Bach's keyboard music and keyboard concertos. Johann Christoph Friedrich Bach, JCF for short, remains the last mystery of JS Bach sons.His brothers, CPE and WF both are widely recognized at their period (transitional-classical)and today, at the keyboard repertoire. We hardly ever source any of JCF's works being played on modern piano. At present, ABRSM has listed JCF's Sonata no.6 in E-flat(as posted earlier)as their Grd7 exam piece. For modern critical editions, observe the titles below, with their respective publishers.
Six Easy Sonatas BR A 3-8, by Schott, $14.39*
Sechs (Leichte) Sonaten BR A 16-21, by Carus Verlag, $26.66
Drei (Leichte) Sonaten BR A 26,27,31, by Carus Verlag $19.93
Sonatina in A minor BR A 12, by Carus Verlag $10.81
Musical Leisure Hours (Selections), ABRSM & Schott $10.81
If one don't want to waste time editing first editions or autographs, these are their choices, readily performable. But for me, I would like to spend some time editing original editions, to make them my editions. The sources for piano sonatas are as stated below with their respective libraries.

• BR A 1\ Keyboard Sonata in F major - from MV
• BR A 2 \ Keyboard Sonata in C major (Wf XI:2) - UGRL/MV
• BR A 3 - 8 \ Six Easy Sonatas (Wf XI:3) - GUL/CB
• BR A 9 \ Keyboard Sonata in C major (Wf XI:4) - CB/B-BC 6312
• BR A 10 \ Keyboard Sonata in G major (Wf XI:5) - CB/B-BC 6312
• BR A 11 \ Keyboard Sonata in F major (Wf XI:6) - CB/B-BC 6312
• BR A 12 \ Keyboard Sonata in A minor (Wf XI:7) - CB/B-BC 6312
• BR A 13 \ Keyboard Sonata in D major (Wf XI:8/1) - CB/B-BC 11307
• BR A 14 \ Keyboard Sonata in A major (Wf XI:8/2) - CB/B-BC 11307
• BR A 15 \ Keyboard Sonata in E major (Wf XI:8/3) - CB/B-BC 11307
• BR A 16 \ Keyboard Sonata in D major - UGRL
• BR A 17 \ Keyboard Sonata in A major - UGRL
• BR A 18 \ Keyboard Sonata in F major (Wf XI:9) - UGRL
• BR A 19 \ Keyboard Sonata in B-flat major - UGRL
• BR A 20 \ Keyboard Sonata in G major - UGRL
• BR A 21 \ Keyboard Sonata in E-flat major - UGRL
• BR A 26 \ Keyboard Sonata in E-flat major - UGRL
• BR A 27 \ Keyboard Sonata in F major - UGRL
• BR A 31 \ Keyboard Sonata in D major - HSL

*Prices are from Presto classical

Grand Total of surviving keyboard sonatas : 23

Abbrev.: UGRL-University Gotha Research Library
              CB-Conservatory of Brussels
              HSL-Hannover State Library
              GUL-Gottingen University Library
              MV-Musikalisches Vierlerley, READILY AVAILABLE IN GALLICA!
              B-BC 6312 - 98 pages - MUS D 77/1-4
              B-BC 11307,MUS D 73 - 16 pages

source:Bach Archiv Leipzig
As this is the first part of my project, collecting the complete keyboard sonatas by JCF. I will make a comparison by musical aspects and other characteristics with his brothers, JS, and his contemporaries after collecting them.
EDIT:
Bach Archiv is offering xeroxes for scanning from the sources with a fee of .50 euros per page, I will update the above list later. Considering the higher price of scanning than to buy the real book, I will turn to buy the books first, then scan the later missing ones.