Complex sentence: She worked as a travel writer for "Queen" magazine and an editor for "Vogue", publishing her first novel, "The Colour of Rain", under a pseudonym when she was twenty-six.
Split into simpler sentences: She worked as a travel writer for "Queen" magazine and an editor for "Vogue". Tennant published her first novel, "The Colour of Rain", under a pseudonym when she was twenty-six.