Resistance Reborn by Rebecca RoanhorseSet just after The Last Jedi, and before The Rise of Skywalker, this book explains how the Resistance starts to recover from its devastating defeat on Crait. It's also fun for people who have been reading other canon books and comics, because it brings together a lot of different characters from them - especially from the Bloodline and Aftermath books and the Poe Dameron comics.
Despite being published as part of the lead-up to The Rise of Skywalker though, it doesn't lead directly into the story of the movie.
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This is a book from the New Canon timeline! It's guaranteed to be consistent with future movies, TV shows, books, and comics (and all new stories since mid-2014).