The Legacy was most definitely a satisfying end to a trilogy that for me, was thought-provoking and mind-opening. The plot of the story fits well into the trilogy. Logevity drugs, having kept humans immune to death and diseases for so long, seemed to have its effects waning. People are dying in the most horrible and grotesque ways. In a desperate act to keep the truth from coming out, Pincent lies and says that the Underground has poisoned the drugs, sending the entire society into chaos. 
 I have to say, this was a much more xciting read than the second book, The Resistance. One gets the sense that because the trilogy is at its end, the pace of the story really picks up. Readers see main characters, Anna and Peter, grow and mature from children to adults, resistence fighters here. We get to see more of Jude and Sheila as well, which is a good thing. :) 
 There are quite a few major twists in this story and truly, by the time you finish this, you'd be wondering why you hadn't read this a lot earlier. :)