Concur with the above.
I was in a similar situation last year. I planned on doing Burial Rites until the last three weeks (or maybe two), because the barrage of linguistic devices in the book as well the unpredictability of the prompts was overwhelming (I chose Burial Rites because I thought it would have been quite impressive if I managed to pull it off given the vast amount of themes, depth and stylistic detail in the book). It worked out well in the end (although I still would have liked to write on Burial Rites as it is a difficult text to execute), as TR was my highest scoring section (20/20 or 19/20). I wrote on a film (All About Eve), so the 2-3 weeks preparation wasn't much of a problem, studied it at school in the second semester, prompts were extremely predictable and 2/3 of the cohort were doing it for the exam so there was a lot of collaboration.
I don't think three days is enough to study a book to the level of depth required for a high scoring essay (9-10/10), unless the range of themes and prompts is extremely narrow. Considering you have been studying Burial Rites up to this point, you've probably covered a fair number of prompts and have some degree of confidence of confidence in the text. If dealing with the vast amount of themes is the main issue, focus on writing essay plans rather than essays, which would allow you to cover more prompts in the same amount of time as well as concentrate on idea generation. Only switch to Maus if studying for Burial Rites is overwhelmingly stressful.