Over the past twenty years, Walden has delved into the question of the identity of the Immortal Beloved. Finding flaws in theories about the main candidates, Antonie Brentano and Josephine Brunswick, he focused on Bettina Brentano. The Beethoven Journal 20110908 Beethoven's Immortal Beloved: Solving the Mystery is admirably and extensively footnoted, and Walden carefully lays out his case with both clarity and an incisive logical method. Quarterly Journal of the Music Library Association This finely researched book is indeed essential reading for Beethoven scholars and amateurs aficionados alike. For readers more inclined to curl up with a good mystery, Walden's book provides a bit of that, too! Notes: The Quarterly Journal of the Music Library Association