Can I read "Acheron" from the Dark-Hunter series early?

I've been reading Kenyon's Dark-Hunter series straight through over the past couple months. I'm just about to start the Dream Hunter book. I am itching to read "Acheron" but don't want to miss any important books along the way. I've read that Devil May Cry is one not to miss. How important are "Dream Hunter," "Upon a Midnight Clear," and "Dream Chaser?" They all come before "Acheron."