There is a huge iBook giveaway from Francis Morgan & Josephine Lai of their 80 early phonics readers. This giveaway will not last long so start downloading as soon as you see this post since each iBook has to be purchased individually. You need to download the iBook reader app in order to read them on your Apple device.
Books 1-52 here: https://itunes.apple.com/us/artist/swrl/id731669223?mt=11
Books 53-80 here: https://itunes.apple.com/us/artist/francis-morgan/id626953438?mt=11