Since I know nothing about the authors, I present to you the information from the "About the Authors" page:
DORA LANDEY was born and raised in Manhattan. Currently a student at Sarah Lawrence College, she lives in the country with her husband and three daughters.
ELINOR KLEIN was born and educated in Massachusetts and was graduated from Smith College. With her son, her husband, and her three dogs, she commutes between an apartment in Manhattan and a donkey farm in the country.
As to the topic of the book, I can tell you that it's about Russia under the Romanovs, as the Revolution approaches, and that the Kirkus Review of the book makes it sound completely insane, like a soap opera in which everyone is on cocaine. We shall see.
Dora Landey & Elinor Klein, Triptych, Houghton Mifflin (Boston: 1983).