Hasidism: A New History by David Biale, David Assaf, Benjamin Brown, and others, will probably be the definitive history of this Jewish movement for some time. There is the scope of the work, from the very early day of Hasidism, when it really wasn’t even an organized movement, to its present-day forms, where Hasidic groups have been revitalized after their terrible losses in the Shoah. There is also its detailed orientation: contemporary scholars have reassessed historical investigations of Hasidism, to ask new questions and reach new conclusions.
This in-depth work is for anyone interested in Hasidism who wants to go knee-deep.