A Course in Metric Geometry (Graduate Studies in Mathematics) Dmitri Burago Yuri Burago Sergei Ivanov The top edge is covered in stains. There are stains in various places. The first and last few pages are heavily stained. The main text is clean. There were a few instances of writing, which I erased with an eraser. There may be some remaining traces. This is an old book, so please refrain from purchasing if you are concerned about its condition.