READERS ARE flocking to an all-star comics anthology just as quickly as its contributors signed up for the charity publication.

“Love Is Love,” a team-up book between publisher IDW and DC Comics in response to last year’s Pulse nightclub tragedy in Orlando, has vaulted to the top of the New York Times bestsellers list for graphic books after a late December release. (IDW, while not announcing sales figures, says that the book is in its third printing.)

The 144-page anthology features one- and two-page comics from hundreds of contributors, including a who’s who of top comic-book talent, as well as such performers as Taran Killam and Patton Oswalt and director Patty Jenkins (“Monster,” “Wonder Woman”). In addition, DC executive Jim Lee drew special Harry Potter art with J.K. Rowling’s approval. The comics range from darker scenes, such as Batman’s investigating the shooting, Deathstroke’s putting away his guns, and panels celebrating love and acceptance.

The book was edited by veteran writer Marc Andreyko (Manhunter, Torso), who said he felt he moved to pitch the idea soon after the shooting last June in the gay nightclub that left 49 dead and 53 injured.

“I couldn’t be more overwhelmed by the response to ‘Love Is Love’ by readers,” Andreyko tells The Post’s Comic Riffs. “This book truly came from a place of love and healing, and to see the book be embraced by so many is a testament to the cause and a lovely remembrance and tribute to those lost on that terrible June night.”

Andreyko, which pitched the idea to IDW’s Chris Ryall, said that contributing to such a book gives creators an outlet to grieve for the victims and a platform to voice their support for survivors and the LGBT community.

“I grew up in the ’80s — I’m a child of the ‘We Are the World’ and ‘Do They Know It’s Christmas?’ ” Andreyko said last month while appearing with Killam on NBC’s “Late Night With Seth Meyers.” “So my reaction was: ‘I know all these comic book people and these professionals and actors — let’s do something.’ ”

The entire proceeds from the book go — via Equality Florida — to people most impacted by the Pulse shooting.

[This post has been updated.]