Queens Kylie and Kendall promote their book.

Kendall wore a daring bustier top and high-waisted skirt as she and sister Kylie attended a book signing at Barnes & Noble Union Square in New York City on Wednesday.

Heading to their hotel

Kris: "I guess they were cold LOL @kendalljenner @kyliejenner @jimmyfallon @fallontonight #fallontonight

Kris:"My little skittle @kyliejenner #smurf #fallontonight"

Makeupbymario: "Watch @kendalljenner and @kyliejenner on Jimmy Fallon tonight. #makeupbymario"

MakeupbyMario: “@kyliejenner and @kendalljenner on Jimmy Fallon tonight #makeupbymario

Sources: 1 - 2 - 3 - 4