There are many different bindings that fall under the category of long-stitch, but most are distinguishable by long stitches that attach gatherings of folded pages (also called signatures)
Bookbinding Fundamentals: Long-Stitch Leather Journal
BOOKBINDING, Long Stitch Variation - perfect for diaries, sketchbooks etc., Corliss Bookbinding - Stefanie
Longstitch Bookbinding Tutorial for a Leather Journal - tortagialla
How I bind my notebooks using glue and paper tape for 0.25€ : r/Frugal
Top 10 Long-Stitch Bookbinding Tutorials - iBookBinding - Bookbinding Tutorials & Resources
Bookbinding Fundamentals: Long-Stitch Leather Journal
screenshot-Bookbinding Fundamentals Long-Stitch Leather Journal - Tuts+ Crafts & DIY Tutorial - iBookBinding - Bookbinding Tutorials & Resources
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Long Stitch Leather Bound Book
Large Leather Hardcover Journal, Leather Diary, Handbound Book of Shadows by Peg and Awl Jackson Tome
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Make your own leather journal with our complete DIY kit! This kit includes everything you will need to bind your own long-stitch journal, plus you can
Leather Journal DIY Craft Kit Long-Stitch Binding
Large Gray Long Stitch Bullet Journal with White Dotted Grid Pages and Hard Covers — paperiaarre
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