For those who aren't familiar with X-23, the character was created to be a guest star on the animated series 'X-Men: Evolution' as a teenaged, female version of Wolverine, and proved so popular that she got her own introduction into the mainstream comic universe. This title is her origin story, and it is darker and more violent than anything that was hinted at in the cartoon, as X-23 is raised from birth to be an assassin for the mysterious 'Facility', and this book explores her brutal upbringing and relationship to geneticist Sarah Kinney, who loves and cares for X-23 but fears and hates what she is being forced to become, whilst trying to free her from those who consider her a tool and a weapon.
Despite X-23's ties to Wolverine, she is made out into her own completely separate character and what happens in the book is so believable and well written that it's easy to forget the Wolverine angle to her origins, and why the character has become popular enough to be included in the New X-Men and X-Force titles. This is a GREAT book and is an essential buy if you're a fan of X-23, and it's worth a look if you're a fan of Wolverine, and the sequel 'Target X' is just as good, further exploring X-23's personality and character.
Be warned though, this book does include adult themes, particularly murder and violence and it doesn't shy away from showing blood, it even comes with a parental advisory label on the back cover, so I'd recommend that this book not be bought for anyone younger than 12