Start with high-confidence ballet & classical dance books, then narrow by subgenre or adjacent topics.
George Balanchine
Robert Gottlieb
Margot Fonteyn
Meredith Daneman
The Ballerina Mindset
Megan Fairchild
Don't Think, Dear
Alice Robb
Ballet and Modern Dance Third Edition
Susan Au
Serenade
Toni Bentley
The Ballet Companion
Eliza Gaynor Minden
Ballet for Dummies
Scott Speck, Evelyn Cisneros
Apollo's Angels
Jennifer Homans
Classical Ballet Technique
Gretchen W. Warren
Balanchine Variations
Nancy Goldner
Being a Ballerina
Gavin Larsen
Diaghilev's Empire
Rupert Christiansen
On Wings of Joy
Trudy Garfunkel