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Although the show kept the fun tone of the book and its perspective-switching format, it changed some main plotlines, character arcs, and other details.
Read on to learn about the major ways the series is different from the book.
Warning: Spoilers for the show and book ahead.
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The original Strand dare and message didn't involve Christmas or singing.
Austin Abrams as Dash.
Netflix
Lily and Dash are younger in the book.
Lily and Dash at Priya's holiday party.
Netflix
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The book's timeline is a bit more sped up.
The show slowly builds up to Christmas, but the book doesn't.
Netflix
Lily's caroling group has different members in the book.
But some of the characters remain the same.
Netflix
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In the book, Dash asks Lily to see a movie she hates as a dare.
"Grandma Got Run Over by a Reindeer" appears in the book and on the show.
Netflix
Lily enjoys baking in the book but she isn't shown baking on the show.
Dash makes mochi, though.
Netflix
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Boomer meets Lily quite a bit later in the book.
Lily and Boomer spoke at the pizzeria.
Netflix
Lily doesn't make her own clothing in the book.
Lily's style is colorful and unique in both the show and the book.
Netflix
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The red boots have a different backstory in the book.
The boots play a larger role on the show.
Netflix
In the book, Dash doesn't see "Collation" alone.
"Collation" is a fictional movie within the show and book.
Netflix
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The dares in the book send Dash to more than one tourist attraction.
On the show and in the book, Dash was sent to Macy's.
Netflix
Dash's dream of owning a specific book is completely cut from the show.
In the book, Dash often speaks about the Oxford English Dictionary.
Netflix
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The show never mentions Lily's cruel nickname, which is heavily featured in the book.
In the books, people call her "Shrilly."
Netflix
Snarl was a larger part of the book.
Snarl got left behind in the book.
Netflix
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Lily's grandfather doesn't have a cat on the show.
In the book, Lily's grandfather has a cat named Grunt.
Netflix
Dash never spends time with his dad in the book.
On the show, Dash got dinner with his dad and his dad's girlfriend.
Netflix
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Lily's nightmare sequence only happens on the show.
Lily's nightmare involves laughter and masks.
Netflix
The first time Lily and Edgar run into each other in the book isn't at the Hanukkah party.
Edgar has a smaller role in the book.
Netflix
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Dash and Lily don't meet at Priya's party in the book.
On the show, Lily attended Priya's party with Edgar.
Netflix
Sofia doesn't try to get back together with Dash in the book.
Austin Abrams and Keana Marie on "Dash and Lily."
Netflix
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Edgar and Lily never kiss in the book.
On the show, Edgar and Lily kiss in a bar.
Netflix
Dash and Boomer don't have a big argument in the book.
There's no concert in the book.
Netflix
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The ManhattanMommies app in the show is an altered version of a mommy blog from the book, which posts about Dash.
The book also has a mom-centric sort of group.
Netflix
In the book, Lily saves a baby's life and ends up in police custody with Dash.
On the show, Lily's family surprises her by coming home.
Netflix
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In the book, Lily's dream of getting a dog comes true.
In the book, Lily really wants a pet.
Netflix
Dash and Lily's New Year's Eve date goes differently in the book.
On the show, their romantic date is in The Strand and involves snacks and ornaments.
Netflix