CC method ?
There may be method books specifically written for CC, but I haven't seen any. Except for brass band music, tuba parts are written in concert pitch (the same for all keys of tuba), and you simply use the fingerings appropriate for the tuba you have. The same is generally true of the method books I'm familiar with (e.g., the Arban); the notes are written in concert pitch, and you just need to use the appropriate fingerings. So you need to use the method books in conjunction with a fingering chart. I do have one method (by Robert Kietzer) that has separate books for different tubas, but in that case it's one book for bass tubas (Eb and F) and one book for contrabass tubas (CC and BBb), the difference being in how high and low the exercises go.
--Frank
Frank Manola
Pan American Eb, Meinl Weston 20, Wessex "Solo" EEb, King 2341 tubas
Besson New Standard, TE 1150 compensating euphs
Park Street Brass
Old South UMC Brass & Organ, Reading MA
Wakefield Retired Men's Club Band
Windjammers Unlimited