Update README.md

Author: davetcc

README.md

@@ -8,14 +8,14 @@ Why? Because on many embedded boards std lib is simply not available, and on oth
 
 Btree list has been expanded upon and broken out from IoAbstraction, as such it has been battle tested in IoAbstraction and TcMenu. Btree list unlike CircularBuffer should not be used across threads. It is safe within tasks on TaskManager.
 
-## Questions and discussions
+## Questions and more documentation
 
 You can ask questions either in the discussions section of this repo, or using the Arduino forum. We generally answer most questions, but the rules of engagement are: **this is my hobby, I make it available because it helps others**. Don't expect immediate answers, make sure you've recreated the problem in a simple sketch that you can send to me. Please consider making at least a one time donation using the sponsor link if we do help you out.
 
 * Discussions section of this git repo (available from top menu of github page).
 * [Arduino discussion forum](https://forum.arduino.cc/) where questions can be asked, please tag me using `@davetcc`.
 * [Legacy discussion forum probably to be made read only soon](https://www.thecoderscorner.com/jforum/).
-
+* https://www.thecoderscorner.com/products/arduino-libraries/simple-collections/
 
 ## Installation for Arduino IDE