Like most school libraries I have a bunch of students who really like fantasy. But that’s a bit like saying they like chocolate. Chocolate is a blanket term that can mean different things to different people and tastes they do vary. Like my poster series for Dystopian fiction – I’m embarking slowly on a number of side projects to demystify other genres in the library so students can find the sub-genre they like most. These things take an enormous amount of time and thought and originally I wanted to present a “fait accompli” in my blog but decided as it would mean I wouldn’t be posting anything for just about forever, to do it page by page.
So far my research into fantasy sub-genres has led to the lists like “A Complete Overview of 18 Fantasy Subgenres“; this article claiming there were more than 50 subgenres, and the rather complex (and adult oriented) NPR Fantasy vs SciFi poster below:

So the path I’m taking is, as usual being guided by my students and what they’re reading and asking for – which is why I started with “Fantastical Beasts – Dragons” because that’s what someone wanted today. Once I have a bunch of posters I’ll try and find a way to link them in some kind of flowchart / decision tree.
I’ve distinguished between YA and Middle Grade, as things can get quite spicy in the fantasy / romantasy etc realm – (you’ll notice my list doesn’t include the Fourth Wing (The Empyrean, #1) by Rebecca Yarros – yet). Usually I indicate whether a book is part of a series in my posters – however one of the great things about fantasy is that nearly all books are part of a series (I’ve generally chosen either the first in the series for my image or the most dragony title). Books is a series is the library equivalent of “all you can eat buffet” as with a little bit of luck the minute they’ve had a taste of the first book they just keep going.

So far, based on my collection and student interest I’ve identified the following areas, romantasy, dystopian, high/low fantasy, magic realism, paranormal, fracture fairytales, mythology, alt. history, animals / fantastical beasts, schools of magic.
What am I missing?