THE VOICE THE INVISIBLE DETECTIVE Tim Brandt, private detective, is known for his ability to thwart the crimes attempted by those who would do wrong. He achieves this amazing feat because he can become invisible, putting fear and uncertainty into criminals who know his as THE INVISIBLE VOICE. His secret is the cloak created by Professor Bert Wilson, which gives him 24 hours of ghostly powers once it has been treated with the amazing sigma rays! THE VOICE appeared in 23 issues of Popular Comics – and for the first time in history, they are all here in one book!