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Funny or not, but the author is a miracle. Their attitude to the book, family, travel, and overall passion is another marvel, too.
The book is also attributed to his mother.

Writing a book is often viewed as a solitary activity. But no one is an island. I can only aspire to personify the values imparted upon me by my family, teachers, and mentors. My work is built on the shoulders of giants - technologists from the past and present who worked, and continue to work, tirelessly to make the world a better place. You may see my name on the cover, but a lot of the credit for this book goes to these individuals...

The countless individuals who contribute to Git, and those who enrich the ecosystem around Git by writing detailed technical blog posts, creating informative videos, and answering questions on Stack Overflow - I am humbled by your work, and I hope that this book will be a valuable addition to your valiant efforts. Thank you.

My eternally patient, much better half, Michelle, who shouldered everything that needed to be done so I could focus on this book. Several of the narratives in this book come from her creative mind. I love you.
My family and my sisters, who (despite their fervent denials) forged me into the individual I am. And finally, you, the readers. Your attention is a scarce resource, and I deeply appreciate the time you’ll spend with this book. Happy learning.

Now go on, Git!

~ "Head First Git: A Learner's Guide to Understanding Git from the Inside Out" by Raju Gandhi [ISBN: 978-1-492-09251-3]

I don't understand why people are down voting you. You've been very helpful.