Digital comics marketplace Comixology has renewed its exclusive sales relationship with Marvel Comics and expanded the global agreement to include Comixology’s parent company, Amazon.

Through the deal Marvel will continue to sell its English language digital periodical comics and graphic novels via the Comixology apps for iPhone, Android and Fire tablets, and via (Comixology, which was acquired by Amazon in April 2014, developed and powers Marvel’s apps and the Marvel Digital Comics store.)

Beginning June 18, under the new agreement, sales of Marvel digital comics and graphic novels to Amazon will be expanded. More than 12,000 single issue Marvel comics will be available for sale via the Amazon Kindle Store to read on the Amazon Kindle.

According to Comixology, the Marvel Comics app has been the #1 grossing book app on Apple’s iOS platform in 2015, and the #1 grossing app for 2015 in the Comics Category in the Google Play app store.

Citing the increasing popularity of reading on devices, Amazon Kindle v-p David Naggar, said the expanded agreement comes at “the perfect time to create a whole new generation of comic book readers.”

Comixology CEO and founder David Steinberger called the new agreement “historic,” and said expanding the agreement to “Amazon’s Kindle platform is an enormous opportunity to reach more fans.”