The Darkness Within Book

Maybe this is just my problem with too-high expectations, but why are the conclusions to most trilogies always such a letdown? I just didn't feel engaged with the story anymore, and I completely lost interest and motivation halfway through. I skimmed the last half and just felt bored and confused. Why bother? Maybe I just like being teased by the possibilities of Book #1 in a series. "Skinned", like "The Adoration of Jenna Fox", raised some interesting bioethical questions. I was never really a fan of the unlikable Lia Kahn, but she just got more aggravating as the series progressed, and her romantic entanglements and friendships felt cold and insincere, as if trying to convince me that mechs can't in fact feel real love. But apparently they can whine and angst all over the place about it. I couldn't get back into the BioMax and Brotherhood conspiracy stuff, and I had to bail out. I'm being generous with two stars since I did enjoy the start to this series, despite its disappointing conclusion.