Jeff Bezos, known as the founder of Amazon, rarely writes product reviews. However, he made an exception for his fiancée, Lauren Sánchez, and her new children’s book, The Fly Who Flew to Space. Released earlier this month,

Sánchez, an author and philanthropist, opens up to PEOPLE about her new book, her home life and her relationship with the Amazon founder

Jeff Bezos' fiancée, Lauren Sanchez, is being sued by her former yoga instructor over her new children's book, 'The Fly Who Flew to Space.'

Despite being one of the most talked about couples in the public eye, not much is known about Jeff Bezos and Lauren Sanchez’s relationship, despite their engagement and dozens of vacations. But now, Sanchez just told People the “one rule” they have, and it’s surprisingly down-to-earth.

Lauren Sánchez and Jeff Bezos stepped out for an ultra-glamourous date night at the Kering Foundation's Caring for Women dinner in New York City on Monday, Sept. 9.

Jeff Bezos praised Lauren Sánchez' children's book on Amazon. The next day, a yoga instructor sued Sánchez for theft of intellectual property.

Jeff Bezos shared a rave review for “The Fly Who Flew to Space,” the new children’s book by his fiancé, Lauren Sánchez. Bezos titled his review “Six Stars” on Amazon, where the book has garnered a 4.8 out of 5 stars since its release earlier this month.