Looking up...
Ich lese gerade ein interessantes Buch über Geschichte.
I'm currently reading an interesting book about history.
A set of written or printed pages, usually bound with a cover, containing information, stories, or other content.
Das Buch hat über 500 Seiten.
The book has over 500 pages.
Er hat ein Buch über Programmierung geschrieben.
He wrote a book about programming.
Used in both physical and digital formats.
Remember that 'Buch' is always capitalized in German as it is a noun.
The plural of 'Buch' is 'Bücher', not 'Buche' (which means beech tree).
From Old High German *buoh*, related to Old English bōc (English 'book'), both deriving from Proto-Germanic *bōks (beech tree, originally used for writing tablets).
Capitalized as it is a noun in German. The plural is 'Bücher'.