There has been some questions regarding this one, and YES, this novel is linked to CRAZY GOOD and SET IN STONE. While I wouldn’t call these series books, ALL of the characters from CRAZY GOOD are in TIME AND SPACE.
Maverick plays a big role in this one. 🙂
It IS a standalone novel, although I would recommend at least reading CRAZY GOOD first for reference. And because, well, Maverick.
Rachel Robinson 
All three books are well written and great for a cold winter night! ( you won’t be Cold while reading) HOT stuff.