Hi, To be honest, if you want those illustrations in vector format, you’d essentially need to recreate them. There are tools that can convert images to vector, but they only work well for simple, clean shapes. Not for detailed or painterly artwork. I’ve published 4 picture books myself, and I’ve never used vector-based drawings for any of them. For many illustration styles, vector simply isn’t the right medium: it’s mathematical and geometric by nature. It can be done, technically, but it’s not designed to capture the texture and nuance of painted artwork. For my first book, I drew everything on paper, scanned the drawings, and then vectorized them in Illustrator. But for that to look acceptable, I had to upload the lineart and the coloured version separately. If you don’t separate them, you’ll never get the same result. And even then, the final vector looked quite different. Which in my case was fine, because that was the style I wanted. Even with that book, the final PDF I sent to the printer didn’t contain vectors anymore, because I used other software for layout and text, which rasterized everything. My later books were all painted in Photoshop and placed directly into the layout as regular images, not vectors. Of course, if the illustrations are too small or the scan quality is poor, that can cause problems for print. But aside from that, it really doesn’t make sense for a printer to insist on vector artwork. Offcourse Henric (comunity creator) has way more experience with this.