Answer:
The speaker uses simile to communicate her main claim.
Explanation:
The speaker's intention is to convey the opinion that a book is a means of traveling in one's mind. To do so, she compares the book to a means of transportation, such as a frigate or a courser. She wishes to show how cheap and simple it is to travel in one's mind as opposed to traveling in real life.
The form of comparison used in the poem is known as simile. Simile uses words such as "like" or "as" to make the comparison while metaphor, on the other hand, does not.
There is no frigate like a book
To take us lands away,
Nor any coursers like a page
Of prancing poetry.
