Paid iPad app: https://itunes.apple.com/us/app/book-creator-for-ipad-create/id442378070?mt=8&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/book-creator-free-make-books/id661166101?mt=8&at=10l6SU
Google Chrome app: https://app.bookcreator.com/sign-in
Website: https://bookcreator.com/
Free Windows program: https://app.bookcreator.com/sign-in
Free Mac program: https://app.bookcreator.com/sign-in
Free iPhone app: https://itunes.apple.com/us/app/word-joust-for-k-5/id461456879?mt=8&uo=4&at=10l6SU
Google Chrome app: https://chrome.google.com/webstore/detail/word-joust/jijjjopeepgneiiamhahbmlnhcomdbml
Website: http://www.sewardreadingresources.com/fourkw.html