Added more resources.

Author: luceCoding

Diff for: system_design/README.md

@@ -1,20 +1,23 @@
-I'll be using this to fill in some content that was not covered enough.
+I'll be using this section to fill in some content that may have not been covered enough.
 Other than that, this will be just a reference for other material that will better explain system design than I can.
 
 I would recommend starting with Grokking the System Design Interview eCourse.
 Worth the money and will fill in a lot of the gaps for a beginner to system design.
 Use the YouTube channels as supplement and Google's SRE eBook for context to some real life scenario debugging.
+I highly recommend picking up "Designing Data-Intensive Applications" book, really good read and to the point.
 
 ## Start Here
 - [Grokking the System Design Interview](https://www.educative.io/collection/5668639101419520/5649050225344512)
 - https://github.com/donnemartin/system-design-primer
 
 ## YouTube suggestions
-I recommend checking this guy's channel (Success in Tech). I would actually avoid Tushar Roy's channel, the quality of system design isn't on par. Another possible channel is Gaurav Sen.
-- https://www.youtube.com/channel/UC-vYrOAmtrx9sBzJAf3x_xw
-- https://www.youtube.com/channel/UCRPMAqdtSgd0Ipeef7iFsKw
+I recommend checking out "Success in Tech" and "Gaurav Sen" on YouTube.
+I would avoid Tushar Roy's YouTube channel, the quality of system design isn't on par, his channel is only good for DS & Algos.
+- [Success in Tech's System Design YouTube Playlist](https://www.youtube.com/watch?v=0163cssUxLA&list=PLA8lYuzFlBqAy6dkZHj5VxUAaqr4vwrka)
+- [Gaurav Sen's System Design YouTube Playlist](https://www.youtube.com/watch?v=quLrc3PbuIw&list=PLMCXHnjXnTnvo6alSjVkgxV-VH6EPyvoX)
 
 ## Other Resources
+- [Designing Data-Intensive Applications Book](https://www.amazon.com/gp/product/1449373321?pf_rd_p=183f5289-9dc0-416f-942e-e8f213ef368b&pf_rd_r=NZSW6YF36GPNR9EM27XB)
 - http://highscalability.com/
 - [Free Google SRE eBook](https://landing.google.com/sre/sre-book/toc/)
-- https://cloud.google.com/kubernetes-engine/kubernetes-comic/
+- [Kubernetes Beginner Comic](https://cloud.google.com/kubernetes-engine/kubernetes-comic/)