A Gentleman and a Scholar

Which of GM Lothar Schmid's (1928–2013) many exploits will be remembered the longest? His near win of the 2nd ICCF World Correspondence Championship (1956)? His arbiter's role in the 1972 Fischer - Spassky Title Match, the 1978 Karpov - Korchnoi Title Match, the 1986 Kasparov - Karpov Title Match (KK3), and the 1992 Fischer - Spassky Rematch? His fabulous collection of chess books?

I think it will be the books.