From 2ccbfe2ba3cce519d2e885a2d2dfff5a8b9ec7ef 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 c7df889cc00..2088b42a5f5 100644
--- a/source/aggregation.txt
+++ b/source/aggregation.txt
@@ -97,9 +97,19 @@ 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 eff202b2a62..bbb23d37471 100644
--- a/source/index.txt
+++ b/source/index.txt
@@ -153,6 +153,9 @@ 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 b0f0ab2d2a6..f2d608593ac 100644
--- a/source/reference/aggregation.txt
+++ b/source/reference/aggregation.txt
@@ -35,13 +35,18 @@ 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>