You can convert your book to a PDF in about as much time as it will take you to read it through, maybe a bit longer.
You will need a sheet of glass to hold the book, spread open, facing downward.
Photograph the book through a sheet of glass to keep the spread pages flat. The glass becomes the subject image plane.
Your camera will face toward the open book reflected in a mirror placed at 45° to the surface of the glass from beneath the glass. The mirror, although not first surface, should not have objectionable reflections when it is aligned. Using this set-up allows you the maximum amount of freedom to move things independent of one another.
Alternately, you can put the glass "image plane" between supports such as an inverted stool using the legs to support the glass sheet. The camera will lie on its back facing directly upward (without a mirror).
Light the book page spread from either side of the camera at 45° to the surface of the glass to avoid glare and reflections. This is standard lighting for copy work.
On the glass you will put marks to align the book after you lift the book to turn the page after each shot.
After the capture, you would import, crop, and paginate your page series for reading.
The set-up while simple will take you some time to align and test. Your biggest challenge will be the counterintuitive positioning of the lighting to be even. You will need a means of making your set-up solid enough (tripod/duct tape, etc.) to remain in alignment throughout the project.
A shutter release will be handy. A tripod will be handy. Maybe you can borrow or rent.
The reason for doing this "upside down" is to compensate for the different thicknesses of each side of the book as you progress through it. The middle is no problem since the thicknesses are the same at that point. The weight of the book will keep it flat most of the time.
Optimal lighting will be even on either side of the book facing upward toward the centre of the page spread.
Good luck, You probably won't try to do this twice.