Just picked up these three books together for 20 euros from a private seller. Not a bad deal I'd say.
Blues And Gospel Records, 1902-1943 (Dixon, Godrich)
Blues And The Poetic Spirit (Garon)
The Devil's Son-In-Law (Garon)
I think the seller was unaware of the international value of the 1902-1943 (starts at around 75 dollar).
I'm not sure but I think the Paul Garon material is part of the 11 paperback series.
Continue my search for the 43-70. Looks like the Fancourt, McGrath edition is not available second hand.
Read somewhere that finding a copy of 1943-1970, Vol. 2, L to Z. is like finding snow in the Sahara.