Book Publisher
Difficulty: Easy
Platform: Web (works best in Chrome), Android, iOS
Price: Free for a limited number of books.
Difficulty: Moderate
Platform: Web, Android, iOS
Price: Free
Difficulty: Moderate
Platform: Web
Price: Free to create books online; educator discount on print books.
Difficulty: Easy
Platform: Web
Price: Free for individual use. Educator plans are free and now include unlimited class sizes and Pro features.