The series hero CTA only inspected chapter.read, so a volume with saved partial progress (e.g. 18%) still rendered "Start Reading" — the button contradicted the progress indicator on the same page. The resume target with progress > 0 now renders "Resume Reading"; untouched series keep "Start Reading" and mid-series targets keep "Continue". Fixes #188 Co-authored-by: Claude Fable 5 <noreply@anthropic.com>