>>2668057
Antony Beevor, Battle for Spain
Probably the best General history desu
The Spanish Civil War: Reaction, Revolution and Revenge (Paul Preston)
Falange's original documents are pretty insightful, even though the Falange party was tiny
>>2668057
"The Spanish Civil War" by Dante Anthony Puzzo
>>2668741
also
Puzzo, Dante Anthony (1962). Spain and the Great Powers, 1936–1941