diff --git a/services-core/index-service/readme.md b/services-core/index-service/readme.md
index cf42bb53..39066cf6 100644
--- a/services-core/index-service/readme.md
+++ b/services-core/index-service/readme.md
@@ -7,4 +7,10 @@ The index service knows which document contains which keywords.
 * [IndexService](src/main/java/nu/marginalia/index/IndexService.java) is the REST entry point that the internal API talks to.
 * [IndexQueryService](src/main/java/nu/marginalia/index/svc/IndexQueryService.java) executes queries. 
 * [SearchIndex](src/main/java/nu/marginalia/index/index/SearchIndex.java) owns the state of the index and helps with building a query strategy from parameters.
-* [IndexResultValuator](src/main/java/nu/marginalia/index/results/IndexResultValuator.java) determines the best results.
\ No newline at end of file
+* [IndexResultValuator](src/main/java/nu/marginalia/index/results/IndexResultValuator.java) determines the best results.
+
+## See Also
+
+The index service relies heavily on the primitives in [index](../../index), 
+such as [index-forward](../../index/index-forward/) 
+and [index-reverse](../../index/index-reverse/).