Automated Storybook PDF Template -- 2

I have a finished 120-page personalized children’s storybook in PDF format and now need it turned into a template that Make.com can fill automatically. I want to hand the file to my automation scenario, pass a simple JSON payload, and receive a press-ready PDF back—same layout, just new text and pictures.

Here’s what I need from you:

• Swap-ready text fields – every “[name]” tag becomes a programmatic placeholder such as {{child_name}} so Make.com can inject the value.
• Swap-ready images – 15 internal illustrations plus the cover must be addressable (e.g., {{image1}}, {{cover_image}}).
• Front & back cover sync – the child’s name updates everywhere it appears, without me touching the file.
• Zero layout drift – fonts, sizes, kerning, and positioning stay identical after replacement.
• JSON gateway – the template must accept data sent from a Make.com module; if you already have a tried-and-tested method (PDF form fields, InDesign variables, Scribus scripts, or another approach), I’m open as long as it plugs into Make.com.
• Output – a single, high-resolution, print-ready PDF that mirrors the original.

To keep things simple, deliver:

1. The converted source file with all placeholders in place.
2. A brief “how-to” note (max one page) explaining the Make.com mapping or module you used.
3. A quick test run proving that JSON injection works (screenshot or sample PDF).

Turnaround: ideally within 3–4 days, one week absolute maximum.

If you’ve handled variable-data PDF generation before—especially with Make.com, pdf-lib, InDesign scripting, or similar tools—I’d love to see one example.