The theme is that of Teshuvah or return. This is probably one of the best books written on this theme since Martin Buber's. The author is something of a poet, a biographer, a historian of ideas, even a sage.
Few people are able to write in so profound and comprehensive a way.
They Made Their Souls Anew is in a class by itself and is going to be talked about for a long time. This gives both a sense of immediacy and a historical basis to the work. It is an interesting and valuable book.