In short: Fever was disappointing in that it was lacking a bit in plot, character development, and believability, but I still cannot help but be swept away by Lauren DeStefano's beautiful prose. 
 I loved Wither when I read it in 2011; it was a darkly atmospheric and beautifully described dystopian and I loved the enigma of the mansion. Fever was a rougher read for me as I felt it had lost a lot of the intrigue that had carried Wither. I had my suspicions that I would feel the same way about Sever as I did Fever, but as I am not someone who ditches series lightly, I felt committed to seeing the series through. Unfortunately, my suspicions were confirmed: like Fever, a significant portion of Sever felt disappointingly aimless and pointless and this nothingness in the plot killed any tension. There were a number of twists introduced and I appreciate the effort to add interest, but unfortunately, they all seemed forced and predictable due to heavy foreshadowing. 
 I am left disappointingly unimpressed by Rhine's character and her romance with Gabriel - they are just SO bland. I was also incredibly frustrated with Rhine's questionable decisions and her inaction for much of Sever. Opportunities came her way to say something, do something, and make a difference, but she seemed to just let them all pass her by. My main interest actually lies with the secondary characters of Sever: the fiery Cecily, the clueless but sweet Linden, and the cunning and villainous Vaughn are all infinitely more intriguing to me than Rhine and Gabriel. 
 One of my biggest offenses with The Chemical Garden Trilogy lies with the world building and premise of the disease. That is, it makes no sense. I found myself questioning how realistic it was after each new piece of information was revealed. The bio major in me was pretty frustrated at the silly and flat out inaccurate explanations presented about the disease. It was very apparent to me that Lauren DeStefano knows next to nothing about immunology and epidemiology and made no efforts to understand it. This likely won't bother most readers, but as someone with a heavy science background, the lack of scientific accuracy was a major problem for me. 
 The one real saving grave of Sever - as well as for Fever - is Lauren DeStefano's writing. She has a real talent for sculpturing this dark and dreary atmosphere that makes you feel like you are drowning in the gloominess. And yet, she somehow is able to find beauty within the terribleness and it's so absorbing that it's hard not to to get sucked in and swept away by it. So overall, I was pretty disappointed with the lack of plot, character development, and believability of the premise in Sever, but could at least still appreciate Lauren DeStefano's beautiful prose. Though I was frustrated at the unrealistic science, I do think the ending felt "right" for the story and it was satisfactory overall.