Volume 3 of SSSS is now open for preorders on the Hivemill store (LINK TO PREORDER HERE) by the publisher Hiveworks! If you also want the signed bookplate and the sticker set that were in the Kickstarter, just wait until after the preorder ends to buy it. (They're still processing the tail end of the Kickstarter orders, which include stickers etc, and they don't want to mess up the inventory count for the warehouse.) You don't need to worry about books running out, they printed enough to last at least a year of regular sales + the Kickstarter for book 4 (which is tentatively planned for the end of this year/early parts of next year.)
As the link says, they expect the preorders to ship out in June, so next month! (Also, if you are in the EU, if you'd prefer you can buy a copy directly from me (only book 3, not 1 or 2) and not need to pay customs since I ship from Finland, while Hivemill ships from America. I'm handling the store on the side of drawing SSSS pages, so I might be a bit slow with getting orders out, but hey. :3 )
Well, that's it for today.