Detective Comics #400 (1970)

In Detective Comics #400, we see the science-obsessed zoologist Kirk Langstrom working tirelessly at the Gotham Natural History Museum on perfecting a serum. This serum has the potential to give people auditory abilities like that of a bat via a specialized bat gland extract. Feeling confident with his progress, he decides to test it on himself, unaware of the dire consequences that follow. Before he knows it, he transforms into the Man-Bat, a formidable opponent to Batman. This marks the first appearance of Man-Bat, making it a highly sought-after comic book for collectors.

But that's not all this issue has to offer. We also witness a gripping tale of Batgirl and Robin, who find themselves embroiled in a dangerous investigation that lands Batgirl in a life-threatening situation. Will they be able to solve the case and save her before it's too late?

If you're a fan of the Caped Crusader or are looking to expand your collection, don't miss out on Detective Comics #400. It's a thrilling read that showcases the talents of both Frank Robbins and Dennis J. O'Neil in their respective stories. At Comics Into Cash, we've seen firsthand just how valuable this issue is, so don't hesitate to reach out to us if you're looking to sell your collection. Trust us, you won't regret it.