Originally Posted by Phonix 
The Dark Spawns get a lot more interesting if you have read The Calling.
As someone who's read that book, I strongly disagree. The implications of The Calling, bar the very final events, have absolutely no bearing on Origins. If Alrik goes onto Awakening then I'd possibly recommend reading a summary, but that's it.
The book is really not that great, and it raises more questions than it answers. It's rare that I give up on a book halfway through, and The Calling is one of those few books.