Collision of Empires: The War on the Eastern Front in 1914

The first 3 chapters, from a strategic POV, are excellent. 5/5
The rest, from a tactical POV, are so detailed and overburdened with names, places, units, dates and so on (and always jumping between different engagements) that, without equally detailed maps every few pages, are useless and quicky turn boring. And there are no such maps. 2/5
I must add that I already knew many of the generals and the general layout of the battles and I still could not follow the book.