For 10 points, name this author of Henderson the Rain King and Herzog.
This author wrote of a title character who survives a mass shooting in Poland during the Holocaust before coming to America and fretting about the sanity of humanity. In a novel by this author, the protagonist makes a financial killing from a play based on his mentor, the commercially unsuccessful writer Von Humboldt Fleischer, based on the real-life writer Delmore Schwarz. In addition to Mr. Sammler's Planet and Humboldt's Gift, this author created a letter-writing character named Moses. For 10 points, name this author of Henderson the Rain King and Herzog.
This author wrote of a title character who survives a mass shooting in Poland during the Holocaust before coming to America and fretting about the sanity of humanity.
Saul {Bellow}