Honestly, the encyclopedia-format book of monsters is the worst possible method of presenting them. Ideally, what's wanted is a fully-indexed and searchable database of monsters that gets updated invisibly every time a bunch of new monsters is released. And if it could include tools for advancing monsters, applying templates, and creating your own, all the better.
Sooooo...NO Monster Manual?!



That's "what's wanted"?
I dunno if I'd really think of it as "&D" if there's no MM...not saying they
couldn't do that, in today's day and age...but, might be my grognard showing again [checks zipper], but I want a book. Is that just me?
Failing that, the monsters would be better presented on cards, provided all the information can be given on a single card. Failing that, the idea behind the 2nd Edition "Monstrous Compendium" is the way to go (but, note, the 2nd Ed MC was implemented in a truly abysmal manner).
Yes, I recall (and have heard for decades since) about the 2e Monstrous Compendium. The "cards" idea is just so...bleck to me. You don't want to tote around a M but a card album or stuffed "recipe card box" is preferable?
If we absolutely must have a book-format Monster Manual, then I felt the 3e version got it about right (and, actually, so did the 1st Ed one - it's just that I came to that significantly later). That is, some monsters (demons, devils, true dragons) were grouped by type, while most (humanoids, undead) were listed alphabetically. As far as I can see, the reasoning behind the distinction was based on what a person first thought of when he thought about the monster. It takes a bit of judgement, but I think those books did get it just about spot-on.
Right. Yeah, distinctions were rather "cuz I sed so". Dragons: 1-36 under "D", but Djinni under "D", Efreeti under "E", Marids under "M"...not a single member of genie-kind, or even some generic "Genie", listed under "G." Giants: 1-10 under "G" but Brownie, Pixie, Sprite scattered all over the place.
Which is kinda what I'm asking about...does that sort of "intuitive" thing work (and we've got 30+ years that seem to say "yeah, it's fine"), "I want a Giant, I'm turning to G. I want a Demon, I'm turning to D." Or are more individual things or more groupings preferable?
the way I'm thinking of it, all Dragons, Demons, etc... would be under D still, but, in the "complete individuality" model, instead of having:
"Dragon:
Common dragon stuff for all dragons.
Black Dragon
Blue Dragon
Brass Dragon..."
You'd have:
"Dragon, Black: all info on black dragons, including the common to all dragons stuff.
Dragon, Blue: ditto blue dragons.
Dragon, Brass: ditto brass dragons.
...
Dragon, White: all things white dragon and common to all dragons stuff.
Dragon Turtle: blah blah blah
Dragonne: blah blah blah
Duegar: blah blah blah."
This would mean Brownies are listed under B, Dryads under D, there would be no "Faerie" section under F.
Demons, Devils, Giants, etc.. would all still appear close together IN the book, as well as being listed identically in the index, since every entry would be:
"Demon, Type I:
Demon, Type II
...
Demon, Lord: Demogorgon
Demon, Lord: Grazzt
Demon, Lord: Orcus..."
Giants, for example, would all be listed,
"Giants, Fire
Giants, Frost
Giants, Hill
...
Giants, Storm
Gnome
Goblin..."
With no "Giants" section, per se.