This quite a large supplement for the price - 77 pages, discounting cover, contents, and license. It's a list of fifteen plants suitable for a fantasy world. They're specifically linked to the Ados campaign setting by the same publishers, but there's no reason why they'd have to be. Plants are just plants, after all.
However, the book is more than a description of some odd botany. Each plant comes with an extensive rules section, explaining how it can be used to make potions, items, armour, and the like. All of these various items are summarised in tables at the back, and cover a wide range of low-level, mostly non-magical, goodies. The list of these items, and their linking to specific features of the world, in the form of unusual plants, is the heart of the book.
The page count is upped by adding in scenario hooks to each plant, with stat blocks for NPCs who want to hire the PCs to collect the stuff, or want to steal it of somebody else, or whatever. This does feel a little like padding, especially since the stat blocks aren't always terribly relevant, but it does at least give some ideas for short encounters.
The layout is very basic, although the artwork isn't bad, and it shouldn't be tough on printer ink. All in all, it's a useful little supplement that could add colour and useful material to a game world, whether one's using it with its intended setting or not.