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I know this is more a Math/Formal Language/Automata/Computer science question than an a programming one, but I hope I can get some advice on a comprehensible textbook (not an indecipherable monograph) on formal logic beyond Propositional and Predicate Calculus. I’m especially interested in monadic second order logic and Büchi Automata.
For now, I’ve only found Automata theory and its applications by Bakhadyr Khoussainov, Anil Nerode. Automata, logics, and infinite games By Erich Grädel, Thomas Wilke (eds). And Formal Models of Communicating Systems: Languages, Automata, and Monadic Second-Order Logic Benedikt Bollig....Way over my head.