SquareFold booklets is an affordable solution in-between saddle stitching and perfect binding,
offering the security of a saddle-stitched spine with the improved appearance of a perfect bound square spine.

The only difference between square back binding and perfect binding is the two small staples. 

 Square bindings lay flat, making it easier to stack, handle, and pack than saddle stitching. 

One of the biggest advantages to choosing square fold binding is the ability to produce short run quantities.