I finished Shambling Towards Hiroshima by James Morrow a few days ago.

I've read a number of Morrow's books, mentioned here, here, here, and here.  This one is different from all of those.  His other books are heavy on the philosophical discussions and implications, while this one feels like a much lighter weight, and shorter, satire.

It's set just before the end of WW2, and postulates that the US had developed Godzilla like creatures that it might need to unleash on Japan since the atomic program isn't going well.  An schlock horror film actor used to portraying monsters is recruited to give a mock demonstration to the Japanese big wigs. 

The book follows his adventures leading up to the demonstration, and afterwards. 

It's a fun romp, particularly if you're a fan of early monster movies.