These are examples of books I make for my son on his special interests at his reading level.
You could approach this in any way -- I use Powerpoint and photos I find online (I do not have the copyright, but it's for a limited educational purpose and I'm not reselling them, so I hope that's okay), then I print and have the books bound at the office supply store.
Here are some examples to inspire you.
Legal disclaimer: The tools and recommendations on this website are not intended to replace the information, training, and support you may receive from qualified medical and therapeutic professionals. It is the parent's responsibility to verify the accuracy of recommendations and information before implementing changes that may impact the parent's child.