docs: further reading QL tutorials

Author: james

docs/language/learn-ql/beginner/catch-the-fire-starter.rst

@@ -147,6 +147,4 @@ You have found the two fire starters! They are arrested and the villagers are on
 Further reading
 ---------------
 
--  Find out who will be the new ruler of the village in the :doc:`next tutorial <crown-the-rightful-heir>`.
--  Learn more about predicates and classes in the `QL language reference <https://help.semmle.com/QL/ql-handbook/index.html>`__.
--  Explore the libraries that help you get data about code in :doc:`Learning CodeQL <../../index>`.
+.. include:: ../../reusables/codeql-ref-tools-further-reading.rst

docs/language/learn-ql/beginner/cross-the-river.rst

@@ -262,4 +262,9 @@ Here are some more example queries that solve the river crossing puzzle:
   #. This query introduces `algebraic datatypes <https://help.semmle.com/QL/ql-handbook/types.html#algebraic-datatypes>`__
      to model the situation, instead of defining everything as a subclass of ``string``.
 
-     ➤ `See solution in the query console on LGTM.com <https://lgtm.com/query/7260748307619718263/>`__
+     ➤ `See solution in the query console on LGTM.com <https://lgtm.com/query/7260748307619718263/>`__
+
+Further reading
+---------------
+
+.. include:: ../../reusables/codeql-ref-tools-further-reading.rst

docs/language/learn-ql/beginner/crown-the-rightful-heir.rst

@@ -161,6 +161,4 @@ You could also try writing more of your own QL queries to find interesting facts
 Further reading
 ---------------
 
--  Learn more about recursion in the `QL language reference <https://help.semmle.com/QL/ql-handbook/index.html>`__.
--  Put your QL skills to the test and solve the :doc:`River crossing puzzle <cross-the-river>`.
--  Start using QL to analyze projects. See :doc:`Learning CodeQL <../../index>` for a summary of the available languages and resources.
+.. include:: ../../reusables/codeql-ref-tools-further-reading.rst

docs/language/learn-ql/beginner/find-the-thief.rst

@@ -292,6 +292,4 @@ Have you found the thief?
 Further reading
 ---------------
 
--  Help the villagers track down another criminal in the :doc:`next tutorial <catch-the-fire-starter>`.
--  Find out more about the concepts you discovered in this tutorial in the `QL language reference <https://help.semmle.com/QL/ql-handbook/index.html>`__.
--  Explore the libraries that help you get data about code in :doc:`Learning CodeQL <../../index>`.
+.. include:: ../../reusables/codeql-ref-tools-further-reading.rst