My experience with young adult angel books has been...limited. I am very new to this subsection of the paranormal genre. And the ones I have read are usually a little cheesy and predictable. So imagine my surprise when I found myself pouring through Jessica Shirvington's Embrace. I loved the characters (especially Phoenix *swoon*), I love the action and most of all I love the incredible amount of detail. Jessica clearly did her research with this one. 
 One of my biggest pet peeves with angel books so far has been the glossy over of the very rich and intricate mythology that comes with them. Some titles are dropped with the brief descriptions and there you go. Embrace really gets into the nitty gritty of the mythology and I couldn't get enough of it.