iOS app and e-book vendor iFlowReader is shutting down as of May 31st, according to an announcement. "We absolutely do not want to do this, but Apple has made it completely impossible for anyone but Apple to make a profit selling contemporary ebooks on any iOS device," part of the statement reads. "We cannot survive selling books at a loss and so we are forced to go out of business. We bet everything on Apple and iOS and then Apple killed us by changing the rules in the middle of the game."