Answer: spine

AnswerCrossword Clue
SPINE

Book's back

SPINE

Title holder?

SPINE

Porcupine quill

SPINE
What a chiropractor manipulates
SPINE
Cactus needle
SPINEBook and body part
SPINEOrthopedists's concern
SPINEInvertebrate's lack
SPINEBack of a book
SPINEMilksop's lack
SPINEBook backbone
SPINECoward's lack, figuratively
SPINEPlace for a title
SPINEResolve
SPINEBook backing
SPINEBook's backbone
SPINESmall harpsichord
SPINEPart of a book.
SPINEThornlike process.
SPINESharp point.
SPINETitle locale
SPINEPart of a book
SPINEBook back
SPINESmall piano
SPINEWhat cowards lack
SPINEBookbinding piece
SPINEBookbinder's back
SPINECoward's lack
SPINEGuts, oddly
SPINEChiropractor's concern
SPINE... -tingling: eerie
SPINEBackbone
SPINECourage
SPINEMoral fiber
SPINETitle location
SPINEBook part
SPINEPlace for a book title
SPINEChiropractor's target
SPINEGumption
SPINE...-tingling