doc: link TypeHandlerLibrary readme (#5222)

docs/Serialization-Overview.md

@@ -21,6 +21,8 @@ The `TypeHandlerLibrary` caches type handlers for various types. Since a single
 
 The `@RegisterTypeHandler` and the `@RegisterTypeHandlerFactory` annotations can also be used to register type handlers and type handler factories to the `TypeHandlerLibrary` in the `Context`.
 
+[Read more about the TypeHandlerLibrary](https://github.com/MovingBlocks/Terasology/tree/develop/subsystems/TypeHandlerLibrary)
+
 ### Examples
 
 #### `TypeHandler` without a `TypeHandlerFactory`
@@ -50,4 +52,4 @@ Terasology currently supports JSON (via Gson) and binary (via Protobuf) serializ
 - Format independent -- code that serializes an object remains the same regardless of the target format.
 - Supports almost every possible type out-of-the-box.
 - Supports recursive types (i.e. types that refer to themselves) but not cyclic object references.
-- It is possible to override default serialization behavior by specifying a new `TypeHandler` that handles a type differently.
+- It is possible to override default serialization behavior by specifying a new `TypeHandler` that handles a type differently.