diff --git a/README.md b/README.md
index e98e59f..5630f57 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,6 @@ This repository contains user-facing documentation for the WebAssembly component
 
 The documentation is published at <https://component-model.bytecodealliance.org/>.
 
-It is envisaged to contain two books, one on the component model itself, and one on WASI (WebAssembly System Interface). At the time of writing, the first book is in development, but the second is not yet started.
+Documentation on WASI (WebAssembly System Interface) can be found at https://wasi.dev/. See the [`wasi.dev`](https://github.com/bytecodealliance/wasi.dev) repository to contribute to that documentation.
 
 Contributions are welcome - see [Contributing](./CONTRIBUTING.md) for more info. Planned work is listed in the Issues section, but if there's content missing that you think would be helpful to gain understanding of the component model, please feel free to add a new issue, or send a PR directly!