Book One: "The Twins have Fallen" Talented medical student, Katrina Kaufmann, transitions into adulthood, experiencing the emotional high of meeting 'Mr Right', followed by the low of feeling responsible for the events leading up to the tragic death of her twin sister, Elizabeth, in the 9/11 attack. Book Two: "Life after Death" The deceased twin, Elizabeth, tells story surviving sister's loss, her entry into the field of genetics, and her bizarre attempts to genetically engineer a replacement. Whilst narrating Elizabeth begins to question how she's able to tell this story, and why she's still here. Book Three: "The Next Generation" Katrina succeeds in cloning herself, and gives birth to a healthy girl. But as the child grows Katrina becomes depressed in the realisation that the clone, Elizabeth 2.0 is not a reincarnation of her sister. Unable to care for the child as a mother should, the child is taken into the care of the state of Illinois. Book Four: "My Sisters' Keeper" Elizabeth 2.0's pubescent years reveal that the clone is 'not quite right'. The adolescent is a hermaphrodite. On reaching sexual maturity the clone self-fertilises, regularly producing clones of her own, clones in her own image, who will, in turn, produce more identical offspring. Book Five: "Pinocchio's Rubicon"* Joanna Morgan, a third-generation discovers 'she' is a cloned hermaphrodite and bound to produce more clones. History repeats itself when she inadvertently causes the death of her twin sister. She embarks on a journey to track down her 34 'sisters', and find the answer to who or what she really is. *Book Five is not included in this set.