Bright Lights, Big Christmas by Mary Kay Andrews

From Mary Kay Andrews, New York Times bestselling author of The Homewreckers and The Santa Suit, comes a novella celebrating love and the warm, glittering charm of the holiday season.
"Nobody does Christmas like Mary Kay Andrews." ―Debbie Macomber
"Cozy up with Santa's favorite novelist!" ―Adriana Trigiani
When fall rolls around, it's time for Kerry Tolliver to leave her family's Christmas tree farm in the mountains of North Carolina for the wilds of New York City to help her gruff older brother & his dog, Queenie, sell the trees at the family stand on a corner in Greenwich Village. Sharing a tiny vintage camper and experiencing Manhattan for the first time, Kerry's ready to try to carve out a new corner for herself.
In the weeks leading into Christmas, Kerry quickly becomes close with the charming neighbors who live near their stand. When an elderly neighbor goes missing, Kerry will need to combine her country...

Toward this end, the course places strong emphasis on mathematical reasoning and exposition. Stated differently, it endeavors to serve as a significant first step toward the goal of precise thinking and effective communication of one's thoughts in the language of science. Of central importance in any overt attempt to instill "mathematical maturity" in students is the writing and comprehension of proofs.

Surely, the requirement that students deal seriously with mathematical proofs is the single factor that most strongly differentiates upper-division courses from the calculus sequence and other freshman-sophomore classes.

Accordingly, the centerpiece of this text is a substantial body of material that deals explicitly and systematically with mathematical proof (Article 4.1, Chapters 5 and 6). A primary feature of this material is a recognition of and reliance on the student's background in mathematics (e.g., algebra, trigonometry, calculus, set theory) for a context in which to present proof-writing techniques.

The first three chapters of the text deal with material that is important in its own right (sets, logic), but their major role is to lay groundwork for the coverage of proofs. Likewise, the material in Chapters 7 through 10 (relations, number systems) is of independent value to any student going on in mathematics. It is not inaccurate, however, in the context of this book, to view it primarily as a vehicle by which students may develop further the incipient ability to read and write proofs