When Wikileaks hacked into and released the emails of Hillary Clinton’s campaign manager last year, perhaps the most unexpected name to surface was Tom DeLonge, best known as a former member of the pop-punk band Blink-182. And the subject matter of his correspondences with John Podesta had many people scratching their heads: Aliens.

If Podesta was interested in UFO-related matters—and he certainly has been in the past—then he went to at least a somewhat reliable source. Earlier this month, DeLonge published a book, "Sekret Machines: GODS," which intends to explore what humans know about alien life. The 454-paged book is part of a series sold by To The Stars, a multimedia entertainment company DeLonge founded. The website states the company has the mission to “inspire a newfound appreciate of the profound, yet unresolved mysteries involving science and the universe.”

Read: Aliens On Other Planets: Look For These 4 Signs Of Extraterrestrial Life Forms, Scientists Say

In other words, DeLonge believes in aliens, UFOs and government involvement in exploring these topics. He also wants to alter the way humans understand their place in the universe, he said in an interview with Mother Jones published Tuesday morning.

“Everyone wants to pin it down to aliens and flying saucers from other planets,” DeLonge said. “And that's not the truth… The idea of where consciousness and quantum physics collide is where you're going to find a lot of the unidentified aerial phenomena. It has to do with human consciousness, spirituality. It has to do with religion.”

Read: Are Aliens Real? Winston Churchill Wrote Essay On Extraterrestrial Life

Dedicated Blink-182 fans know that DeLonge has long had an interest in extraterrestrial life. Eighteen years ago, the pop-punk group released a song called “Aliens Exist,” in which they tell a hypothetical mother: “Hey mom, there’s something in the backroom/Hope it’s not the creatures from above.” And then: “We all know conspiracies are dumb/What if people knew that these were real?”

But DeLonge’s latest book, which was co-written by Peter Levenda, goes beyond rhetorical curiosities. It’s the second installment in a greater project meant to explore those ideas. According to DeLonge’s plans, the series will involve several books and feature films.

If changing the way humanity thinks about aliens seems like a lofty goal, DeLonge isn’t fazed.

“My whole life has been completely about being underestimated,” he said. “You'll always see me doing things that I have no business doing. Whether it's directing a major motion picture or meeting with the most important people in government and dealing with the biggest subjects on Earth…  It doesn't mean I'm going to win on all of them, but God damn, it looks like I've got a pretty good shot at it.”