The Diatonic Harmonica Reference – One of the best free sites with an excellent progression of articles for the beginning to advanced player.First Lessons Blues Harmonica David Barrett’s excellent starter book.Harmonica for Dummies An excellent primer/reference book by Winslow Yerxa.Harmonica Learning Resources Recommended Beginner Books Here is a selection of some of the best free and paid subscriber harmonica learning resources. Additional HarpNinja modes help you practice and learn Songs, Scales, and Riffs faster, as well as provide a quick and easy music theory calculator via the interactive Circle of Fifth’s. It does this by providing real time feedback on the accuracy of your playing, helping you to visualize the note layouts of different keys, tunings, scales and chords – this being one of the biggest challenges for harmonica players that other instrument learners don’t have. HarpNinja is not designed to replace this excellent body of harmonica knowledge, but is meant to be used a tool to speed your learning in addition to whatever program or teacher you choose to use.
There are lots of books, audio, video, and website resources from many superb harmonica player/educators that are available for learning harmonica.