Can data be inserted in a PDF?

Further, imagine a large blank space covering, say, two thirds of the height of the page, that is allowed to be filled with details. We know the (X,Y) coordinates of the upper left corner of the blank space. How can we fill in, say, a picture of a book along with the title and author on each row available in the blank space? The rows are say, 3 cm. in height.

// from: https://help.syncfusion.com/file-formats/pdf/working-with-text#drawing-text-in-an-existing-document

//Get first page from document

PdfLoadedPage page = loadedDocument.Pages[0] as PdfLoadedPage;

//Create PDF graphics for the page

PdfGraphics graphics = page.Graphics;

//Set the standard font.

PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 20);

//Draw the text.

graphics.DrawString("Hello world!", font, brush, new Syncfusion.Drawing.PointF(20, 20));