- Recorder from Zero by Charles Fischer a progressive method for beginners that uses real Renaissance music as study examples
- try the first 10 pages for free: downloadable pdfs here
- Bass Lines & Fantasies by Alice Kanack Drones, “Whats the Answer to my Question?” and animal fantasy pieces in all 12 major keys
- Instant Harmony Articles and other publications by David Lasocki and Batty Bang Mather, including valuable workbooks on cadenza writing, French baroque ornamentation, free ornamentation and preluding
From the website of Australian flute maker Terry McGee, an excellent summary of 18th C flute techniques excerpted from the treatises of Rockstro and Nicholson.
An interesting new book by Rogier de Pijper on extended techniques for flute, with exercises that are accessible by younger students: