The first in the Liaison series, titled Hushed Words, features a naive young woman drawn into an unorthodox relationship with a wealthy businessman, in a plot reminiscent of the bestselling 50 Shades of Grey books.
In the second title, Tribal Connections, a Scottish youth worker travels to the United States to meet a man she has met on the internet.
Maggie Seed, commissioning editor of the series – which has been nicknamed Fifty Shades of Tay – said they would replace My Weekly Pocket Novels.
Meanwhile, an erotic novel by a 26-year-old Edinburgh University graduate set in the world of the capital's New Town has become a US hit. On Dublin Street, by Samantha Young, beat JK Rowling's The Casual Vacancy to the top of the Kindle USA charts.