With faux disbelief, "A book?" then, more flatly: "No seriously we had a category for that too. Category: transformation, subcategory: book. I think there's even cross-links for genre."
Other options:
no subject
With faux disbelief, "A book?" then, more flatly: "No seriously we had a category for that too. Category: transformation, subcategory: book. I think there's even cross-links for genre."