Her notable work includes illustrations for a US edition of Alice's Adventures in Wonderland in 1904, for the first edition of The Secret Garden, and for several books by L. M. Montgomery and Johanna Spyri.
[4] During her career, Kirk illustrated more than fifty books, including an American edition of Alice's Adventures in Wonderland in 1904.
Her style is individual, little influenced by the Jugendstil or Art Deco movements.
[2] In 2009, the Folio Society of London used Kirk’s illustrations for its new edition of At the Back of the North Wind.
[5] A review of Alice's Adventures in Wonderland (1904) in The Advance magazine said of it "Fifty-seven illustrations by M. L. Kirk and John Tenniel will keep the small reader at fever heat.