There is a blog category here on St. Thérèse of Lisieux that includes various posts related to her.
ICS Publications has a page of books related to this saint, including their Study Edition of Story of a Soul. Ignatius Press has an English translation of Bernard Bro's biography St. Thérèse of Lisieux: Her Family, Her God, Her Message.
Short biographical sketches about St. Thérèse can be found at the websites of The Carmelite Order (O. Carm.), the Thérèse 2002 website, and there is a page about her at the website alone with the Alone.
Picture: Statue of St. Thérèse of Lisieux at El Carmelo Retreat House taken at dawn. Photo by me.