Murder Madness is a science fiction novel by Murray Leinster first published in 1930. 

Murder Madness! Seven Secret Service men had completely disappeared.

Another had been found a screaming, homicidal maniac, whose fingers writhed like snakes.

So Bell, of the secret "Trade," plunges into South America after The Master--the mighty, unknown octopus of power whose diabolical poison threatens a continent!

Murder Madness was first published in Astounding Stories Stories of Super-Science in May, June, July and August 1930. It was first published in book form in1931 by Brewer and Warren. 

Total Running Time (TRT): 7 hours, 32 min.

Murray Leinster (1896-1975) was a pen name of William Fitzgerald Jenkins, an award-winning American writer of science fiction and alternate history. He wrote and published over 1,500 short stories and articles, 14 movie scripts, and hundreds of radio scripts and television plays.