8. A system according to claim 1 , further comprising: a unique spine identifier to select one or more one unique spines from the formed spines; and a display to present the unique spines.
9. A system according to claim 8 , further comprising: a spine group generator to generate one or more spine groups, comprising: a comparison module to compare at least one remaining spine from the formed spines with the placed unique spines; an identification module to identify the placed unique spine most similar to the at least one remaining spine; and a placement module to position the at least one remaining spine adjacent to the placed unique spine.