TLDR The whole book doesn’t have the letter e so the plot in the wiki doesn’t either

I see what you did there 😉

A Void's plot follows a group of individuals looking for a missing companion, Anton Vowl. It is in part a parody of noir and horror fiction, with many stylistic tricks, gags, plot twists, and a grim conclusion. On many occasions it implicitly talks about its own lipogrammatic limitation, highlighting its unusual syntax. A Void's protagonists finally work out which symbol is missing, but find it a hazardous topic to discuss, as any who try to bypass this story's constraint risk fatal injury. Philip Howard, writing a lipogrammatic appraisal of A Void in his column Lost Words, said "This is a story chock-full of plots and sub-plots, of loops within loops, of trails in pursuit of trails, all of which allow its author an opportunity to display his customary virtuosity as an avant-gardist magician, acrobat and clown."

I also find it funny that this paragraph from OP's link also avoids using an individual symbol. I'm also trying to do it in my post, but it's hard to form any thought without it. I don't think that I could draft a full book using this constraint, and notably a book that's so cognizant of it's own imposing limitation and of it's protagonists habit of fourth wall smashing.

How surprising! I thought that symbol most popular in "La disparition"'s original localism, but this wiki says this translation's vocabulary has a similar proportion and thus - probably - a similar difficulty.

My mood was spoilt by looking up this author and what folk call him. Oh, I wouldn't want to construct a book of this kind. It hurts.

An individual should start an avoid5 community

Why do most subposts in this post look kinda off?

Fascinating! I may find looking at this book in my todo list.

(This is hard!)

How about "most famous and trustworthy virtual information vault"? Or is that too much?

Don't know why, but I find this absolutely eerie.

Thanks! Fascinating, I will look it up!

Lovecraft Howard Philip called the author a clown. I don't know if that's an insult or a compliment, given the time period that would have had to be in. Clowns were cool at some point, right?