If you are determined to do this with an odometer goal, then I think you’re going to have to play tricks with odometer resets as described in Restarting Odometer to non-zero value.
You could consider pairing the odometer goal with a time spent reading goal. Track furthest page read in the odometer goal, but give yourself credit for all the time you spend both reading and re-reading in the reading time goal.
I personally prefer time-based goals with difficult books, but then give myself credit for the time I spend writing notes about the book. Tracking the time spent incentivizes me to understand the book, rather than biasing me toward just reaching the last page.