It cannot be denied that reviewing the work of a former tutor does give something of a vicarious pleasure: but in this instance Bruce Waller has nothing to worry about !
Bismarck is the sort of work that history students are very happy to see. It is brief, to the point, and notes all the significant historical arguments about Bismarck's plans (if any); achievements; and possible motivations. The foundation of the empire, Kulturkampf, relations with political parties, foreign policy etc are all covered here. This is a very thoughtful book - though if you are unfamiliar with the period a simpler work with a chronology may be needed as a backup to help you place some of the arguments in context.
All in all very well recommended.