Below are some comic strip and cartoon books scheduled for June 2020 release.
Images and links (mostly) via Amazon,
though ordering through your local comic or independent book store is a good idea.
DC Goes to War
Big Nate Stays Classy
Scary Godmother Omnibus
Speed Bump: A 25th Anniversary Collection
The Tea Dragon Society (paperback)
Jake the Fake Keeps His Cool
Tails of Tottering Hall
Greetings From the Wasteland
Everything Is an Emergency: An OCD Story in Words & Pictures
Smart George
Inks: The Journal of the Comics Studies Society Volume 4, Issue 1
Johnny Dynamite: Explosive Pre-Code Crime Comics
And a couple of late additions:
Fastrack and Safe Havens collections are now available, each containing the complete calendar year of material from 2016.
Safe Havens: Dave’s Gold
https://www.lulu.com/en/us/shop/bill-holbrook/daves-gold/paperback/product-48wqvn.html
Fastrack: Dethany, The Office Goth
https://www.lulu.com/en/us/shop/bill-holbrook/dethany-the-office-goth/paperback/product-n7zrye.html