iBooks Author

iBooks Author (iBA) was an e-book authoring application by Apple Inc, released in early 2012, only available for macOS, and discontinued in 2020.[2]... Documents created by iBooks Author could only sold for a fee if they are accepted by and distributed by Apple,[3][4] but authors also had the option to distribute their work elsewhere for free.... iBooks Author was discontinued on July 1, 2020, with Apple suggesting Pages as a replacement. https://en.wikipedia.org/wiki/IBooks_Author