Resize Book Cover for Print

I already have the finished cover artwork; I only need it resized to meet my printer’s specifications.

Your task is to create two press-ready double-page spreads:

• Outer cover (U4 + spine + U1) at 307 mm × 216 mm, incorporating a 5 mm spine and a 3 mm bleed on every edge.
• Inner cover (U2 + spine + U3) at the same 307 mm × 216 mm, with identical spine width and bleed.

No design changes are required—keep all existing images, text, and colors exactly as supplied. Simply expand the canvas, align the spine precisely, and extend background elements into the bleed so nothing important is trimmed.

Deliverables
• Print-ready PDF (PDF/X-1a or PDF/X-4) with crop marks and correct bleeds
• Editable source file (InDesign, Illustrator, or Photoshop) with linked assets intact

Please double-check every measurement before exporting and flag anything that seems misaligned. A 24-hour turnaround would be ideal, but let me know your realistic timeline. I’ll provide the current artwork files as soon as we start.