Check out the cover and our conversation with Christina Lauren below.

ENTERTAINMENT WEEKLY: This story deals directly with the woes of online dating.

We put out a questionnaire to our Facebook group, and we got like 40 different responses from women.

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Credit: Alyssa Michelle

It was really helpful and fun.

Because I dont know how I would do it.

Theres just a range.BILLINGS:We did hear about great experiences too.

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Gallery Books

A bunch of the people who answered had met their significant other or spouse on an app.

She came out, and we met and decided to start writing together pretty much then and there.

Your heroine is a UCSB professor.

We tend to have a bunch of stories happen on the West Coast.

Millies profession in general was inspired by my reading a book on female serial killers.

It was fun for us to explore that because neither of us is like that at all.

It was a fun little puzzle to play with.

I live very close to UC Irvine, and I used to do academic research.

You have the tension of State Street and all the bars, and then you have the beach.

Hopefully we captured some of that in the book.

Sometimes we like to take our little twist on something to see how we would play with it.

We realized 100 different authors can take a stab at the exact same trope and do it completely differently.

This is just one we wanted to try because wed never really done it before.

At some point they will be lying to the person that theyre close to.

That movie has been on all the time in our house lately because my kids absolutely love it….

But the whole going incognito thing, that has been really fun.

And the mishaps that can happen when youre trying to hide a really big secret like that.

One of the things we suffer from as a genre is making sure theres enough story to the story.

It cant just be two people in a room being talking heads together the entire book.

Normally Lo likes to doodle a cover on a napkin.

Lo and I were talking and were like, What if it just looks like the iMessage screen?

because thats essentially whats happening in the book.

Our books traditionally have brighter colors, so it just worked.

That would have probably made it perfect.

My favorite thing in the world is that feeling where your heart is dropping into your stomach.

I love that feeling.