Yes, it's ALL here: All eighteen* issues – in their entirety, covers, letters pages and all** – of the epochal, definitive single-creator anthology comic book series: Daniel Clowes's Eightball! Everything is as it originally appeared, in black & white and/or full color. Also included are the two short "Behind the Eightball" addendums that were prepared for the hardcover slipcased edition.
One and done!
*Yes, of course, you are correct: Eightball did indeed run for 23 issues, but, as you also know, these first 18 issues constitute the entirety of its "single-creator anthology comics book series" run. #s 19-21 serialized David Boring, #22 was the original version of Ice Haven, and #23 contained Death Ray.
**And, yes, even the Modern Cartoonist insert is included.