Sweet vintage with a fun H/h. Heroine has been jilted by her fiance after he falls in love with her younger sister, so she gives up her nursing career to be a medical secretary to the hero, a surgeon. He's such a nice guy that all the nurses at the hospital call him Dear Doctor Marcus. Heroine doesn't notice him at first, but eventually falls in love with him.
Meanwhile, she thinks he is in love with a beautiful Irish nurse and he thinks she's in love with a sad sack advertising man who is pining for another.
All those misunderstandings don't keep them from forming a solid friendship that includes lots of banter and sweet moments. They are meant to be together.
There are all kinds of side characters including his family, her family, medical student parties, sailing holidays, a pesky dog, etc. . . I was interested in all of them except for the sad sack OM. I was tired of him long before the heroine finally told him to get overhimself.
One very unusual feature of this vintage novel was that there was entire chapter that showed the reader the H/h after they got engaged. It was so sweet to seem them all loved up and flirty back in the office. Just a nice story all around.