This is a question we are frequently asked by clients, and ultimately its down to preference. for the typical business be it a sole trader, small to medium enterprise etc the best option really is saddle stitched. This is when the sheets of paper are stapled toward the top and bottom to hold them together, its more than adequate for most clients probably around 99%.
In the event you need a booklet that has a hard edge to it, this is called perfect bound. Most people who order this do so for special events or when they are looking to write a book on a subject like heath, engineering etc. A bound booklet is considerably more expensive, but in the everyday world we live in its not as popular as saddle stitched.
Our range of Booklets and Brochures are available in DL, A6,A5 and A4 Formats plus we provide custom solutions also to suit your needs.