This is the 6831st most frequent Japanese word.
ブック
"ブック" means "book" in English.
Here, 'ブック' is used to mean 'book', referring to a physical or digital book as a source of information.
このブックを読んで新しい知識を得ました。
I read this book and gained new knowledge.
In this sentence, 'ブック' indicates a 'photo book', a collection or compilation of photographs in a book format.
旅行のための写真ブックを作りました。
I created a photo book for the trip.
Here, 'ブック' is part of 'ブックマーク' (bookmark), showing its usage in a compound word to mean saving a reference, often digitally.