Here are a few flute resources I love to use and share with my students:
Tone and Technique
The Technique and Theory of Improvisation (McBirnie)
Daily Exercises for the Flute (Moyse)
Methode Complete de Flute Vol. 1 (Taffanel and Gaubert)
Methode Complete de Flute Vol. 2 (Taffanel and Gaubert)
Music-Related Reading