I did around chapter's 24-26 because these few chapters to me where the most exciting and are most important in the book it's where Gregor finally understands the prophecy and is sure of what he need's to do until Ares comes and saves him and not Henry.
This is the part where Gregor goes failling because he finally understands the end of the Prophecy Of Grey.
This is the part where Gregor is falling and many rats start dying, the King will not let Gregor get away.
Ares HELP ME!!
This is the part where Henry thinks that Ares will save because of there bond but that's not what happens.