Elizabeth Prentiss sought in her life to grow in her love for her Savior as her most famous hymn describes. A friend of hers wrote of her:
Believing in Christ was to her not so much a duty as the deepest joy of her life, heightening all other joys, and she was not satisfied until her friends shared with her in this experience. She believed it to be attainable by all, founded on a complete submitting of the human to the Divine will in all things, great and small (Elizabeth Prentiss, 'More Love to Thee', by Sharon James pp. 208-9).I would definitely commend the biography to you, but if you are limited to one Prentiss book, I would suggest her own work, Stepping Heavenward. I have read this book three times through, and each time I found more to identify with. Though it is written and set in the 19th century, the emotions and reactions displayed and experienced by the heroine are so characteristic of the way women think, that I believe any Christian woman would benefit from the godly, practical wisdom in it.
If reading more good literature was a resolution for 2009, I would like to try to convince you to add Prentiss's Stepping Heavenward to your list.