Elizabeth Mona Brougham Drew Bickerstaffe Brent (October 10, 1829 – July 13, 1916) was an Irish writer of books for children.
She was born Elizabeth Mona Drew on October 10, 1829 in County Cork, Ireland, one of seventeen children of the Rev. Pierce William Drew, the rector of Youghal, and Elizabeth Oliver Drew. In 1851, she married the Rev. Harry Lloyd Bickerstaffe and they would have four children, including the future writer and Roman Catholic priest Francis Bickerstaffe Drew. Rev. Bickerstaffe was a violent drunk and the couple separated in 1859. During the separation, he married another woman and was tried for bigamy. They obtained a divorce in 1861.
In the 1860s, she wrote a number of books for children, including books on nature and a book about Japan. In 1870, she married Charles Brent. In 1878, her son converted to Catholicism and she did as well the following year. In 1909, she was awarded the Pro Ecclesia et Pontifice.
Mona B. Bickerstaffe died on 13 July 1916 in Winterbourne, Wiltshire.