How would one digitize a thick book into a PDF version in the most time-efficient way, using only a camera and a computer?

For this example I have a:

• dSLR camera (Canon EOS) + no tripod
• latest commercial version of Adobe Acrobat
• a computer with inteet
• frugal character

I also own a physically printed and bound book of over 600 pages I would like to convert to PDF.

What are methods/technologies/software features I can use to accomplish this

a. without buying any new hardware, so no extra physical tools one wouldn't have lying around the house
b. software-wise free, if at all possible
c. obviously the whole point is with the least amount of time and effort as possible ;)

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