I was hunting for a physical copy of 'Expiration Dates' last month and found it's still primarily an ebook/audiobook from what I could tell. The author, Rebecca Serle, seems to have a deal with Amazon Publishing for that title, so print copies aren't widely distributed through regular bookstores. I checked Barnes & Noble and my local indie shop—nothing on shelf. You might get lucky with a used copy seller on Amazon Marketplace or AbeBooks, but prices were inflated when I looked.
Honestly, for home use, I'd just grab the Kindle version. It's a quick, compelling read, the kind you finish in a weekend, so a permanent hardcover isn't super necessary. The premise is fun—a woman receives notes predicting how long her relationships will last—but it's more of a binge-read than a display-piece novel. If you're dead-set on paper, setting a stock alert on Bookshop.org or checking Walmart's online book section occasionally might turn something up. I gave up and read it on my iPad; no regrets.