2016, K. A. Beestone, "Introduction to The Book Nest", The Book Nest, Spring 2016, page 4:
Over the last few years, we've seen the booklr community grow as quickly as our shelves, […]
2016, Jenna Kilpinen, "Bookternet and diversity", Contrawoman, December 2016, page 18:
Booklr user ladybookmad started #readthemargin, dedicating the month of December to reading books by marginalized authors.
2017, Kathryn Perkins, "The Boundaries of BookTube", The Serials Librarian, Volume 73, Issue 3-4 (2017):
Some popular sites outside of BookTube are: Goodreads (a website dedicated to the online book community), Tumblr (aka “Booklr”), Instagram (aka “Bookstagram”), and Twitter.
2018, Dorothee Birke & Johannes Fehrle, "#booklove: How Reading Culture is Adapted on the Internet", Komparatistik (2018), page 63:
On YouTube, users who describe themselves as BookTubers are vlogging about books and reading, on Instagram we find posters using hashtags such as #bookstagram, while Tumblr has a sub-community Booklr.
