where can I read the novels?
They aren't translated in English as far as I know (the first one might be, I can't recall). But you can get the Japanese versions from yesasia.
It doesn't follow the novels. I read the novels. (Also I'm the translator of this manga). It uses the same theme/concept but the stories themselves deviate from the original novels.
Oh, ok. Thanks for letting me know. And thank you for translating!
I hope this follows the novels. I love Edogawa Ranpo!