DC Comics has agreed deals to sell monthly comics in the Kindle, iBookstore and Nook Book stores, after experiencing a near 200% rise in digital sales over the past year.

Previously the publisher’s monthly comics were only available digitally through digital comics platform Comixology, although DC did sell graphics novels through the above three stores. DC’s digital comics sell for the same cover price as the print edition ($2.99 to $3.99), although this drops to $1.99 after a month.

DC said that digital comic sales are up 197% year-on-year for the year to date, while the whole digital comics market is estimated to have generated more than $25m in 2011, according to comic news site ICv2.

“Digital is a big part of how I think we’ve been able to boost overall sales [print and digital],” DC Entertainment SVP of Digital Hank Kanalz told VentureBeat. “It really proves what digital (comic books) can accomplish, because not everyone has a comic shop near them.”