The one-sentence version: send the biggest, sharpest version of your artwork that exists, in RGB, and let us handle every measurement.
Trim size, bleed (0.125" beyond every edge — we extend or crop with care), spine width (computed from your final page count and paper — it changes if your book changes, which is exactly why it's ours), barcode zone, title/author typography if you want ours, and Amazon's full print validation.
Web images are 72 DPI — beautiful on screens, mud on paper. Go back to the original file.
Anything within a third of an inch of an edge risks the trimmer. Keep words and faces centered; we'll show you the safe zones on your proof.
Books are taller than wide; a square or landscape image will lose its edges to fit. If your art is precious to the last inch, tell us and we'll compose around it rather than crop it.
Your own work, or art you hold print rights to. The form asks you to warrant exactly that, and production stops if it isn't true. (Commissioned a painting? Get the artist's okay for print use in writing — a text message counts.)
What happens next: upload the art with your order. We build the wrap, you get a proof, nothing prints without your yes. Most covers are ready within a day.
Questions? books@prontopublishing.com — a person reads every message.