Books I have recently read
The Revolution of 1905 in Odessa by Robert Weinberg deals with Odessa and the 1905 revolution period and how it affected the city and why it had such a bad Pogrom against Jews.
Tannenberg The First Thirty days in East Prussia by MG Sir Edmund Ironside (Later a Field Marshall see his wiki bio) deals with the battles of fought in East Prussia, including Tannenberg in the first part of WW I not the best book in the world does have a good selection of maps and has some good insites on the German and Russian armies and what they did right and got wrong.