If I weren't so allergic to classics, I may have read the original stories just to see how Morgan became bitter in the first place. In all of the retellings I've come across so far, Merlin and Morgan are always connected in some sort of way, but everyone fails to tell how Morgan became so bitter and cold in the first place (or maybe it just doesn't pertain to the plot and no one cares too much about Morgan aside from making her an integral part of all things magically evil).
Henge doesn't start out terribly interesting – Lovejoy has Morgan competing in a magical competition to join Arthur's Round without her father's knowledge (then getting in trouble), meeting Merlin at the competition, and giving readers flashbacks to Morgan's past that have little to do with the entire competition aside from setting us up for the overall plot of the entire story.
For awhile in the beginning, the writing was a bit impassive and the book didn't seem like something I would end up liking in the long run, despite the idea and the mere fact Morgan IS the main character – when has that happened? Morgan's typically depicted as someone who's cold, bitter, ambitious, and has a major vendetta against the world (and Merlin). The only thing I did keep in mind from early on is how Lovejoy integrated the magical world of Camelot into the modern world with its technology while keeping Camelot's traditional medieval ways – lords, ladies, knights, oh my!
As Arthur's Round continues on toward the end and we get closer to finding out who the Maven will be, Henge gets better – Lovejoy's writing becomes more interesting, Morgan becomes more bitter as she finds out the real reason why her mother was executed a decade ago (thus becoming more like the Morgan Le Fay highly known as today), and us readers are left hanging precariously on a cliff at the very end until the next book in the series graces the world with its presence.
(I'll even battle Rundus for it if I have to. And most likely lose in the process.)