A couple's pre-flight routine took an unexpected turn when the wife realized she had forgotten her book.

What started as a moment of frustration quickly became a viral sensation when the woman, Alexis', husband Derek came to a thoughtful and unique rescue—by writing her a book of his very own. The video , which has been liked by 2 million users, shows Derek meticulously typing on his phone, not for a game or a social media scroll, but to write his wife a custom book for her to read.

Alexis, who is in her early 20s, shared the story behind the video with Newsweek .

She said she and her husband had just arrived at the airport after a busy morning when she discovered her book was missing.

"I went to get something from my purse and realized my book wasn't in there," Alexis said. "I w

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