From 13e30bd19a692a1e0af88f496caa64de054cda6b Mon Sep 17 00:00:00 2001
From: Naomi Pentrel <5212232+npentrel@users.noreply.github.com>
Date: Fri, 7 May 2021 12:47:33 +0200
Subject: [PATCH] DOCSP-15709: Link to Practical MDB Aggs Book

---
 source/aggregation.txt           | 14 ++++++++++++--
 source/index.txt                 |  3 +++
 source/reference/aggregation.txt |  9 +++++++--
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/source/aggregation.txt b/source/aggregation.txt
index 64107ceaf93..83cd15fa5e1 100644
--- a/source/aggregation.txt
+++ b/source/aggregation.txt
@@ -138,9 +138,19 @@ For a feature comparison of the aggregation pipeline,
 map-reduce, and the special group functionality, see
 :doc:`/reference/aggregation-commands-comparison`.
 
+Learn More
+----------
+
+Practical MongoDB Aggregations E-Book
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+For more information on aggregations, read the `Practical MongoDB
+Aggregations <https://www.practical-mongodb-aggregations.com>`__ e-book.
+
+
 .. toctree::
-   :titlesonly: 
-   :hidden: 
+   :titlesonly:
+   :hidden:
 
    /core/aggregation-pipeline
    /core/map-reduce
diff --git a/source/index.txt b/source/index.txt
index cbcddece88d..7d450974cc8 100644
--- a/source/index.txt
+++ b/source/index.txt
@@ -152,6 +152,9 @@ MongoDB. You can:
 - Download the `Architecture Guide
   <https://www.mongodb.com/lp/whitepaper/architecture-guide?tck=docs_server>`_
 
+- Read the `Practical MongoDB Aggregations
+  <https://www.practical-mongodb-aggregations.com>` e-book__
+
 Licensing
 ---------
 
diff --git a/source/reference/aggregation.txt b/source/reference/aggregation.txt
index 7ca569f4b66..d18b60a96d9 100644
--- a/source/reference/aggregation.txt
+++ b/source/reference/aggregation.txt
@@ -37,13 +37,18 @@ Aggregation Reference
       the aggregation pipeline and operators in MongoDB and common SQL
       statements.
 
+`Practical MongoDB Aggregations (e-book) <https://www.practical-mongodb-aggregations.com>`__
+   For more information on aggregations, read the `Practical MongoDB
+   Aggregations <https://www.practical-mongodb-aggregations.com>`__
+   e-book.
 
 .. toctree::
-   :titlesonly: 
-   :hidden: 
+   :titlesonly:
+   :hidden:
 
    /meta/aggregation-quick-reference
    /reference/operator/aggregation/interface
    /reference/aggregation-commands-comparison
    /reference/aggregation-variables
    /reference/sql-aggregation-comparison
+   Practical MongoDB Aggregations (e-book) <https://www.practical-mongodb-aggregations.com>