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Verlyn Flieger
Verlyn Flieger is an author, editor, and Professor Emerita in the Department of English at the University of Maryland at College Park, where she taught courses in comparative mythology, medieval literature, and the works of J. R. R. Tolkien. She is well known as a Tolkien scholar, especially for her books Splintered Light, A Question of Time, and Interrupted Music. She has won the Mythopoeic Scholarship Award four times for her work on Tolkien's Middle-earth writings.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

Une lumière éclatée
2014
ISBN 9782220066325
Splintered light
2002
ISBN 9780873387446