Julia Justiss 
RAILWAY COUNTESS_HEIRS IN2 EB [EPUB ebook] 

She didn’t want to marry Least of all a Viscount!Marcella Cranmore wants to avoid marriage and continue using her mathematical expertise to help her railway engineer father – but her mother insists on her having a Season. At her first ball, Marcella’s relieved to see someone she knows, railway investor Crispin D’Aubignon. Conversing with the Viscount is safe, for she’s as off limits to him as he is to her…except that’s only increasing the fascination!