diff --git a/free-programming-books.md b/free-programming-books.md
index 8786ed0502f4f3bd2c8c0979a986bfbedd317c1d..9f031257334a38bc8754ad9835a092d3036151d6 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -878,6 +878,7 @@ Kerridge (PDF) (email address *requested*, not required)
 
 * [ASP.NET Core 2 Succinctly](https://www.syncfusion.com/ebooks/aspnet-core-2-succinctly) - Simone Chiaretta, Ugo Lattanzi
 * [ASP.NET MVC Music Store](http://mvcmusicstore.codeplex.com)
+* [ASP.NET WebHooks Succinctly](https://www.syncfusion.com/ebooks/aspnet_webhooks_succinctly) - Gaurav Arora
 
 
 ### Assembly Language
@@ -1325,6 +1326,7 @@ Kerridge (PDF) (email address *requested*, not required)
 #### Gradle
 
 * [Building Java Projects with Gradle](http://spring.io/guides/gs/gradle/)
+* [Gradle Succinctly](https://www.syncfusion.com/ebooks/gradle_succinctly) - José Roberto Olivas Mendoza
 * [Gradle User Guide](https://docs.gradle.org/current/userguide/userguide.html) - Hans Dockter, Adam Murdoch ([PDF](https://docs.gradle.org/current/userguide/userguide.pdf))
 
 
@@ -1934,7 +1936,9 @@ Kerridge (PDF) (email address *requested*, not required)
 ### .NET Framework
 
 * [Akka.NET Succinctly](https://www.syncfusion.com/ebooks/akka_net_succinctly) - Zoran Maksimovic
+* [Application Security in .NET Succinctly](https://www.syncfusion.com/ebooks/application_security_in_net_succinctly) - Stan Drapkin
 * [Clean Code .NET](https://github.com/thangchung/clean-code-dotnet)
+* [Cryptography in .NET Succinctly](https://www.syncfusion.com/ebooks/cryptography_in_net_succinctly) - Dirk Strauss
 * [Entity Framework](http://weblogs.asp.net/zeeshanhirani/my-christmas-present-to-the-entity-framework-community)
 * [Entity Framework Core Succinctly](https://www.syncfusion.com/ebooks/entity_frame_work_core_succinctly) - Ricardo Peres
 * [Game Creation with XNA](https://en.wikibooks.org/wiki/Game_Creation_with_XNA) - Wikibooks
@@ -2458,6 +2462,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Scala for Perl 5 Programmers](https://github.com/garu/scala-for-perl5-programmers) - Breno G. de Oliveira
 * [Scala for the Impatient (A1 Scala Level chapters)](http://www.typesafe.com/resources/e-books) - Cay S. Horstmann
 * [Scala School by Twitter](http://twitter.github.io/scala_school/)
+* [Scala Succinctly](https://www.syncfusion.com/ebooks/scala_succinctly) - Chris Rose
 * [Scala Tutorial](http://www.tutorialspoint.com/scala/scala_tutorial.pdf) (PDF)
 * [tetrix in Scala](http://eed3si9n.com/tetrix-in-scala-html5-book)
 * [The Neophyte's Guide to Scala](http://danielwestheide.com/scala/neophytes.html) - Daniel Westheide