The book The Mirror of the Blessed Virgin Mary (Speculum Beatae Mariae Virginis) and The Psalter of Our Lady (Psalterium Beatae Mariae Virginis) (trans. Sr. Mary Emmanual, O.S.B.; St. Louis, MO: B. Herder Book Co., 1932) which contains these two opuscules of the Seraphic Doctor, St. Bonaventure, is to be highly recommended.
The Psalterium is the most interesting, since it is a Marian adaptation of the Roman Psalter. St. Bonaventure gave emended the initial verses of the Psalms so as to make them into praises and prayers to Our Lady. The most interesting feature (at least to me) was how the Saint emended the Canticles of the Divine Office, and he even adapted the Te Deum.
Saints such as St. Alphonsus and St. Louis Marie expressed admiration for this work of St. Bonaventure.
Attached are the scans of the pertinent pages.