This page is a reference for web admins.

How to Embed PDFs:

https://support.squarespace.com/hc/en-us/articles/206545267-Using-Issuu-with-Squarespace

Linking Ticketbud to Squarespace:

http://blog.ticketbud.com/sell-tickets-on-squarespace/

The gif below is from this page.