Kate Middleton's sweet messages inside books for strangers are going viral

The Cambridges are undoubtedly one of the most talked-about families in the world.

Following their role elevation over the coronavirus pandemic and their mention in Prince Harry and Meghan Markle's Oprah interview, it’s hardly surprising that Prince William and Kate Middleton are making non-stop headlines right now.

The Duchess of Cambridge usually makes the most news, from the announcement that she's entering the world of publishing to her handy face mask trick.

It was her new photography book, Hold Still 2020, that made headlines this week.

The Duchess of Cambridge has been marking the occasion by leaving special copies around the UK for people to find, with personal notes inside.

'Let the search begin!' the Cambridges captioned a sweet video of Kate leaving books for members of the public to find. 'We’ve joined @bookfairies_uk for the day to share copies of Hold Still around the UK with you.'

The post continued: 'Each copy is adorned with a gold book fairy sticker, gold ribbon, and has a letter from The Duchess tucked inside. To make this activity even more special, book fairies, the Hold Still judges and participants of the final 100 images are leaving copies at places that gave them hope during the lockdown.

'This special book documenting the unique collection of photographs goes on sale today in UK bookshops and online.'

It was after the announcement of the book hunt that Kate made news again, as a photograph from a twitter user revealed what Kate had actually written inside the 150 books.

'Dear finder,' reads the note inside a copy of Hold Still found in London's Van Gogh Walk. 'The Hold Still book documents a photography project which captured a portrait of our nation as we lived through the first COVID-19 lockdown last year. The images tell the stories of the challenges we all faced, but also how we came together in the most extraordinary of times.

'I am proud to have worked closely with the National Portrait Gallery on this project, and thrilled that the Book Fairies across the country are returning the images to the communities at the heart of Hold Still.

'Once you have finished looking through the book, please leave it somewhere else in your community for the next person to enjoy. With my very best wishes, Catherine.'

Well, that's lovely.