On the plane or train (short): Adé: A Love Story by Rebecca Walker. A lovely, bittersweet novella that you can lose yourself in for a couple of hours and finish by the time you land.
On the plane or train (long haul): The 100-Year-Old Man Who Climbed Out The Window and Disappeared by Jonas Jonasson. Whether your journey is mundane or insane, it can't be any crazier than the adventures Allan Karlsson after he skips town on his 100th birthday. I've recommended this book all year and everyone agrees it's a hoot.
On your phone, in the passenger seat on the way to the mall for some last minute shopping: The Awesome Girl's Guide To Dating Extraordinary Men by Ernessa T. Carter. A good girlfriend-y novel about four pals making all of the requisite mistakes in love and finding themselves along the way.
On the subway: In My Shoes by Tamara Mellon. As the book opens, the co-founder of Jimmy Choo totters into her job at Vogue two hours late (again) and hungover (again) and is promptly fired. That sets the tone for a book where she doesn't bother to sugar-coat anything or anyone.
Tucked away in your childhood bedroom, hiding away from the family: Meaty by Samantha Irby. If NSFW reading (and language) is not for you, proceed to the next recommendation. But, if you're a bit of a potty-mouth like myself and totally dig smart, irreverant hilarity? Dig right in.
The plane or train ride home as you mentally prepare to return to work: The Legs Are The Last To Go by Diahann Carroll. Sure, you may not be looking forward to heading back to the grind. But reading the story of a woman who put in the work for decades and came out of it a legend? If she can do it, so can you.