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 ## Books
 - [Distributed Systems for fun and profit](http://book.mixu.net/distsys/single-page.html) [Free]
-- [Distributed Systems Principles and Paradigms, Andrew Tanenbaum](https://www.distributed-systems.net/index.php/books/distributed-systems-3rd-edition-2017/ds3-sneak-preview/)
+- [Distributed Systems Principles and Paradigms, Andrew Tanenbaum](https://www.distributed-systems.net/index.php/books/distributed-systems-3rd-edition-2017/ds3-sneak-preview/) [Free with registration]
 - [Scalable Web Architecture and Distributed Systems](http://www.aosabook.org/en/distsys.html) [Free]
 - [Principles of Distributed Systems](http://dcg.ethz.ch/lectures/podc_allstars/lecture/podc.pdf) [Free] [ETH Zurich University]
 - [Making reliable distributed systems in the presence of software errors](http://www.erlang.org/download/armstrong_thesis_2003.pdf), [Free] Joe Amstrong's (Author of Erlang) PhD thesis 
 - [Designing Data Intensive Applications](https://www.amazon.com/Designing-Data-Intensive-Applications-Reliable-Maintainable/dp/1449373321) [Amazon Link]
 - [Distributed Computing, By Hagit Attiya and Jennifer Welch](http://hagit.net.technion.ac.il/publications/dc/)
 - [Distributed Algorithms, Nancy Lynch](https://www.amazon.com/Distributed-Algorithms-Kaufmann-Management-Systems/dp/1558603484) [Amazon Link]
-- [Impossibility Results for Distributed Computing](http://www.morganclaypool.com/doi/abs/10.2200/S00551ED1V01Y201311DCT012) (paywall)
+- [Impossibility Results for Distributed Computing](http://www.morganclaypool.com/doi/abs/10.2200/S00551ED1V01Y201311DCT012) [paywall]
+- [Designing Distributed Systems, Brandon Burns](https://azure.microsoft.com/en-us/resources/designing-distributed-systems/) [Free with registration]
 
 ## Papers
 Must read papers on distributed systems. While nearly *all* of Lamport's work should feature here, just adding a few that *must* be read.