A stranger's step by step guide to immortality

A great person once said that in the world of humans, it is impossible to achieve eternal life...and I took that personally...
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This is not a fantasy book. It's a scientific book, since science is the closest thing to magic we have in our universe.
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It is a simple depiction of the research made by a person striving for perpetual improvement. Themes such as Oncology, Epigenetics, Robotics and Philosophy will be the main ingredients.
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Now, whether such a lofty goal is even possible in the first place...who cares?
After all...one must imagine Sisyphus happy...