In 'In My Heart's Shelf' poem, what does the speaker compare his or her mother to?

The speaker compares her mother to her favorite book of poems.

Explanation:

In My Heart's Shel is a poem written by A. Gautam. These are the lines where the speaker provides the answer: She's transforming. My favorite book of poems - leather-bound, ornamented, sprinkled with gold, more beautiful than old. Then, the speaker describes the mother as somebody full of wisdom (as a book is supposed to be,) and also uses a semantic field related to this, by choosing words like bookmarks, journeys stamped on rhymes, an index page.