"As you know, I've always been an open book," the 54-year-old singer began in an emotional Thursday.

Source: https://www.newser.com/story/328890/celine-dion-reveals-rare-disorder.html

Atiku’s life is an open book, and not the mystery or close book that continues to define the life of Bola A. Tinubu.

Source: https://theeagleonline.com.ng/atiku-to-tinubu-the-world-knows-you-as-a-forger-in-chief/

In other words, you could capture a picture of an open book and effortlessly copy the texts, including texts with unique formatting or complex characters.

Source: https://www.ibtimes.co.uk/windows-11-ai-update-adds-google-lens-like-ocr-camera-snipping-tool-1719750

On Sunday, Mr Faulding said he had only cleared the area around the bench where her mobile phone was found, and that the tidal section beyond the weir was 'an open book.'

Source: https://www.dailymail.co.uk/galleries/article-11771415/Partner-missing-UK-mom-heartbroken-body-pulled-river.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

Though her best known credits as a screenwriter are for more kid-friendly cartoons (“Moana,” “Ralph Breaks the Internet”), Ribon has, as an essayist, blogger and podcaster, long been an uncommonly open book.

Source: https://www.gjsentinel.com/news/us/the-oscar-nominee-that-says-a-lot-just-with-its-title/article_3853e50e-af0c-58eb-b32e-4243b4c0540e.html