Acknowledgements

I am grateful to my relatives, friends, colleagues, and many others for their great supports and services during the last five years of illness of my beloved wife. The departure of my wife to eternity on February 5, 2020, opened up a new dimension in my mind to put together my thoughts into books. Since then I started composing several books one on “A Comprehensive Guide on COVID-19”, the second one on “Fundamentals of Electricity & Magnetism” the third one is on “Fundamentals of Newtonian Mechanics” and fourth one on “The Truths of Life and Al-Qur’an”. To put together a huge amount of information to compose four books will obviously take time, lots of literature search and research will be required. My priorities are to complete and publish these books as soon as possible. Human civilization is at its apex of knowledge and understanding due to the inventions of many technological tools that include but not limited to computers, smart phones, internet, fiber optics network, satellites, air planes, cars, trains, ships, vaccines, medicines, medical equipment and many others. Personally, I am taking one of these technological advantages to compose my electronic books using the incredible and prolific tools developed by Yihui Xie [https://twitter.com/xieyihui] which transforms R Markdown documents into a book. My acknolowledgement is for Yihui Xie for making the “Authoring Books and Technical Documents with R Markdown” available to us.