Harryette Mullen's fifth poetry collection, Sleeping with the Dictionary, is the abecedarian offspring of her collaboration with two of the poet's most seductive writing partners, Roget's Thesaurus and The American Heritage Dictionary. In her ménage à trois with these faithful companions, the poet is aware that while Roget seems obsessed with categories and hierarchies, the American Heritage, whatever its faults, was compiled with the assistance of a democratic usage panel that included black poets Langston Hughes and Arna Bontemps, as well as feminist author.