Merge commit '9f1265fde4b9ef186148337c99f08601633b6056'

docs/content/en/getting-started/configuration.md

@@ -44,7 +44,18 @@ Multiple site config files can be specified as a comma-separated string to the `
 
 In addition to using a single site config file, one can use the `configDir` directory (default to `config/`) to maintain easier organization and environment specific settings.
 
-- Each file represents a configuration root object, such as `Params`, `Menus`, `Languages` etc...
+- Each file represents a configuration root object, such as `params.toml` for `[Params]`, `menu(s).toml` for `[Menu]`, `languages.toml` for `[Languages]` etc...
+- Each file's content must be top-level, for example:
+  
+  In `config.toml` is:
+  ```toml
+  [Params]
+    foo = "bar"
+  ```
+  In `params.toml` is:
+  ```
+  foo = "bar"
+  ```
 - Each directory holds a group of files containing settings unique to an environment.
 - Files can be localized to become language specific.
 

docs/content/en/getting-started/external-learning-resources/index.md

@@ -26,6 +26,10 @@ Hugo in Action is a step-by-step guide to using Hugo to create static websites.
 
 [Hugo In Action Home Page](https://www.manning.com/books/hugo-in-action)
 
+### Build Websites with Hugo
+
+[Build Websites with Hugo - Fast Web Development with Markdown (2020)](https://pragprog.com/titles/bhhugo/) by Brian P. Hogan.
+
 ## Video tutorials
 
 ### Video Playlist by Mike Dane