Merge remote-tracking branch 'apollo/patch-2' into james/add-paid-section

Author: jamesmunns

README.md

@@ -164,6 +164,9 @@ These materials are available publicly, typically under permissive licenses.
 These materials are available for purchase. They have been reviewed for relevancy, but are not
 specifically endorsed or reviewed for accuracy or quality by the Embedded Working Group.
 
+- [Simplified Embedded Rust: Standard Library Edition](https://www.theembeddedrustacean.com/c/ser-std) - This book provides a quick path to start learning embedded Rust with minimal setup. Book is based on ESP devices and the Wokwi Simulator. This edition uses the standard library development approach which is based on the ESP-IDF framework.
+- [Simplified Embedded Rust: Core Library Edition](https://www.theembeddedrustacean.com/c/ser-no-std) - This book provides a quick path to start learning embedded Rust with minimal setup. Book is based on ESP devices and the Wokwi Simulator. This edition uses the core library development approach for bare metal development.
+
 ## Tools
 
 - [xargo](https://github.com/japaric/xargo) Rust package manager with support for non-default std libraries — build Rust runtime for your embedded system.