She lost herself in the magical world of the book.

Meaning: This means she became so absorbed in the book that she forgot about everything else.

Choice of Words: Lost means unable to find or remember the way to a place or thing. Herself is a reflexive pronoun referring to the subject of the sentence. Magical means relating to or involving magic or supernatural powers. World is the physical universe or the place where we live. Book is a written or printed work consisting of pages glued together along one side and bound in covers. Together, they convey the idea of her becoming so engrossed in the book's magical world that she forgot about her surroundings.

Alternative Expressions

Related Expressions