Well as far as I have seen, nowadays itīs impossible to extract the last read position from a .mbp file. The problem is that itīs not clear where in the file itīs exactly stored, or better said: how to decode it.
https://wiki.mobileread.com/wiki/Mbp#MBP
As said in
http://www.angelfire.com/ego2/idlelo...ile_format.txt there are 4 four positions related with the last read position but not further or detailed information is given :-(
Iīm sad reading that. Thatīs a really pity