Wiktionary
n. 1 (context idiomatic English) Something of which salient aspects are obvious or easily interpreted. 2 (context idiomatic English) A person who through naivete responds candidly to questions or openly displays their emotions or intentions. 3 (context mathematics topology English) An open book decomposition. 4 (context climbing English) An inside angle in the rock.
Wikipedia
Open book may refer to:
Open Book is a technical rock climbing route at Tahquitz Peak, CA. Since the Yosemite Decimal System was developed at Tahquitz it is no coincidence that the first climb to be rated 5.9, Open Book, is also located at Tahquitz. In 1952, when Royal Robbins climbed it free, it was one of the most difficult free ascents in the country.
"Gary Barlow: Open Book" is a set of recorded interviews with Gary Barlow in 1997 and 1998 which he is shown to express his feelings on the Take That split and how he is adjusting to his solo career. The video was also packed with a promo of the single " Hang On In There Baby" which was released around Europe commercially but not in the UK.
'Open Book ' is a BBC Radio 4 book review programme, presented by Mariella Frostrup
The programme is broadcast on Sundays and Thursdays in the United Kingdom, and is available online via iPlayer, as is an archive of past issues.
The programme's BBC Programme Identifier (PID; a unique identifier) is b006qp6p.
Open Book is the second studio album from Scottish alternative rock band Fatherson and was released on 3 June 2016. The album includes the singles "Always", "Lost Little Boys" and "Just Past the Point of Breaking". The album marks the band's first release with their new label Easy Life/Sony Music UK.
Usage examples of "open book".
It showed a man standing beside a lectern, on which lay an open book, exactly like the books which stood on the pedestals in his father's library back on K'veer.
He thumbed through it, then with open book before him, started to question Libby.
He guesses that his mostly beardless face must be an open book, and wishes he had never shaved.
The homely, peaceful sounds of munching and blowing rose up to the loft above, where Jamie Fraser reclined in a comfortable, haylined nest, an open book propped on his chest.
Just in front of her was a clean wide table with two clean pie-dishes on it, and an open book.
There were times when Luke truly wished his emotions were not an open book to his wife - this was one of them.
Brown took him around to where, in the shade of the house, Abe lay his full length on the ground, with an open book before him.