First off, thank you so much for making Invisible Sun come to life in the first place! As a token of our appreciation to you, we'll be providing you with some great goodies (you don't even have to back this new campaign to receive these):
• We Begin at the End in PDF
• The Art of Invisible Sun 2 in PDF
• New prop set in PDF
• Prop-crafting kit (digital)
New products you won't be receiving automatically, but can add on through this campaign:
• The Art of Invisible Sun 2 in print
• Enchiridion of the Path in print and PDF
• Physical version of the new prop set
Make sure to take a look at the add-on graphic to see if there are any other extras you might want: Vislae Kits, dice sets, Wicked Keys, medallions...
If you're not sure how to back the Kickstarter solely for add-ons, look for that answer in the FAQ above.
Remember: helping to spread the word will make it more likely the campaign will fund and reach stretch goals that get you free stuff!