The ape who guards the balance

I found this fairly gripping on first reading, but I don't think it's quite as good as the previous book in the series ([b:Seeing a Large Cat 18868418 Seeing a Large Cat (Amelia Peabody #9) Elizabeth Peters https://i.gr-assets.com/images/S/compressed.photo.goodreads.com/books/1384917857l/18868418.SY75.jpg 1619486]), mainly because of the return of the Master Criminal Sethos (and his followers), whom I find rather tiresome and implausible. Admittedly the series is not supposed to be very plausible, but let's say he doesn't appeal to me.