Something Fresh by P. G. Wodehouse
I've read several of Wodehouse's Jeeves and Bertie books, but Something Fresh is the first of his Blandings Castle series I've picked up. It was funny and light-hearted and just a nice break.
Lord Emsworth, owner of Blandings Castle, accidentally stole a valuable scarab from his son's fiancée's father, a millionaire American. Our two main characters, Ashe Marson and Joan Valentine, are headed to Blandings Castle for a house party, both trying to retrieve the scarab and receive the reward. They both are impersonating servants, so we see a lot of what is happening downstairs. Ashe and Joan have a lot in common even though they have only recently met; they are both writers, both live in the same building, both could use a new direction, something fresh. In the meantime, Lord Emsworth son may or may not be a spot of trouble over a former crush. Now that he is engaged, those letters he wrote to another woman may cost...