an open book

noun

: a person or thing that is easy to learn about and understand
My life is an open book. I have nothing to hide.

Examples of an open book in a Sentence

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Actress Ione Skye, 51, is an open book in her debut memoir Say Everything. Gillian Telling, People.com, 4 Mar. 2025 Make your business an open book by showing how sustainability is embedded in sourcing, production and operations. Expert Panel®, Forbes, 22 Jan. 2025

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“An open book.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/an%20open%20book. Accessed 27 Mar. 2025.

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