The Liar's Dictionary by Eley Williams

Mallory is an intern charged with fact-checking entries to a dictionary being digitized. Specifically, she is looking for "mountweazels" or fake entries that were added to the previous edition.
David Swansby is her boss and the sole editor of the crumbling publishing house. This job proves to be something more interesting as Mallory starts receiving threatening phone calls. Mallory and David don't seem too upset by what they consider crackpot calls but Mallory's girlfriend Pip is very alarmed and joins in to assist Mallory or get her out of a potentially dangerous situation. The story is told in dual time periods in alternating chapters. The earlier story is about one of the first employees- his innocent additions of the mountweazels and obsession with a captivating woman engaged to someone he detests. Both stories are delightful and compete in their wit and charm but they come together in the connective tissue of Swansby House and the search for love and acceptance. The writing is smart and funny, the vocabulary extensive and you will want to introduce every mountweazel into your everyday conversations. 4 stars