There are 7 titles associated with this person.

Costello, Louisa S. The Soldier's Orphan: A Tale. By Mrs. Costello. In Three Volumes. London: Longman, Hurst, Rees, and Orme, 1809.
Costello, Louisa S. The Maid of the Cyprus Isle, and Other Poems. By Louisa S. Costello. London: Sherwood, Neely, and Jones, Edmund Lloyd [23 Harley Street], John Sharpe [Piccadilly], James Harper and Co. [London], Richard Rees, John Walker VI, 1815.
Costello, Louisa S. The Maid of the Cyprus Isle, and Other Poems. By Louisa S. Costello. Second Edition. London: Sherwood, Neely, and Jones, Edmund Lloyd [23 Harley Street], John Sharpe [Piccadilly], James Harper and Co. [London], Richard Rees, John Walker VI, 1815.
Costello, Louisa, S., Jane Taylor, Allan Cunningham, Joanna Baillie, and Percy B. Shelley. Poetic Flowers, selected by E. Sandham; author of 'The Twin Sisters'. 'Travels of Saint Paul', 'Scripture Geography', &c. &c. Southampton: Thomas Baker [Southampton], 1818.
Costello, Louisa S. Redwald; a Tale of Mona: And Other Poems. By Louisa Stuart Costello. Brentford: Philip Norbury, 1819.
Costello, Louisa S. Songs of a Stranger. By Louisa Stuart Costello. London: John Taylor and James Augustus Hessey, 1825.