E. M. Epps is a writer and bookseller in Seattle, WA.
The E. and the M. do stand for real names, but they are not names anyone uses, even the author's mother. In her daily life, E. M. Epps goes by Emma, which is (to be clear) NOT a combination of the E. and the M.; it's a mid-length version of the long name that the E. stands for. Wait, was that clear?
Suffice it to say: do not call her Em, and all will be well.