One of the most common mistakes new Shopify booksellers make is choosing a niche and then stocking it based on gut feeling - picking titles they personally love or recognize without checking whether those books are actually moving right now. The result is a catalog full of titles that were hot three years ago and a store that struggles to convert visitors who came in looking for something current.
The good news: there's a repeatable research process that takes less than an hour and will give you a clear picture of what's trending in any niche before you add a single title.
Step 1: Use BooksCloud's Bestseller Percentile Filter
This is your first stop, and it's more powerful than most new users realize. Inside the BooksCloud app, you can filter the catalog by bestseller percentile - meaning you can sort to see which titles within a given category are actually selling at a high rate relative to the full catalog. This is real sales data, not editorial curation or publisher marketing.
Search for your target niche (cozy mystery, romantasy, wellness, business, etc.) and apply the bestseller percentile filter. Pay attention to books in the top 10-20% of their category - those are the titles with proven demand. Cross-reference these against the other sources below to confirm the trend is current and not fading.
Step 2: Check the NYT Bestseller Lists
The New York Times Bestseller List (nytimes.com/books/best-sellers) is updated weekly and broken into highly specific categories: Combined Print & E-Book Fiction, Young Adult Hardcover, Advice/How-To/Misc, and more. For any niche you're researching, find the closest matching NYT list and study the top 15 entries.
Note which titles have been on the list for multiple weeks - longevity on the NYT list indicates sustained reader demand rather than a one-week spike. These are the titles you want anchoring your store.
Step 3: Mine Goodreads Trending and Listopia
Goodreads is the closest thing the book world has to a social proof engine. The "Trending" section on the homepage shows books gaining momentum right now, while Goodreads Lists (Listopia) let you find reader-curated rankings for extremely specific sub-niches: "Best Cozy Mysteries Set in Bakeries," "Romantasy with Found Family Tropes," "Business Books for Women Entrepreneurs."
These lists are invaluable because they show you not just what's popular but what readers in the niche care about categorically - which helps you understand how to organize and merchandise your store's collections.
Step 4: Search BookTok Hashtags on TikTok
Open TikTok and search the hashtag for your niche: #cozymystery, #romantasy, #selfhelpbooks, #booktok. Sort results by "Most Liked" rather than "Most Recent" to find videos with proven engagement. Pay attention to which specific titles creators are holding up to the camera, reviewing, or building content around.
BookTok can surface a title weeks before it appears on any official bestseller list - making it your best early-warning system for emerging trends. A title getting 500,000 views in reading recommendation videos is going to sell. Add it to your store before the broader market catches up.
Step 5: Cross-Reference and Prioritize
After running through these four sources, you'll have a list of titles that appear across multiple signals - showing up in BooksCloud's top percentile AND on Goodreads lists AND in BookTok videos. Those are your anchor titles. Build your initial store around them, then use the individual title search in BooksCloud to add them specifically.
A Note on Timing
Trends in book niches move fast. A title that's on fire in January may plateau by April. Plan to revisit this research process at least monthly, especially if you're in a fast-moving niche like romantasy or thriller. The stores that stay current win repeat customers. The stores that don't get abandoned for somewhere that feels more alive.