What a beauty! The terrific Alex Schomburg cover on the left is Marvel Mystery Comics #57 published July 1944 by Timely .  Its another “P” Book that I felt very lucky to come across.   

Cover features one of Timely’s “Big Three,” Human Torch (aka Jim Hammond) and his sidekick Toro fighting off evil doers around a Van der Graff generator. Inside content also includes Sub-Mariner and Red, White and Blue superheros Miss America as well as The Patriot.