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lbruckon What to Do When the Trisector Comes (1983) [pdf]

Underwood Dudley has written more comprehensive books about mathematical cranks (in general) and trisectors (in particular) which are a delight to read.

lbruckon The DynamoDB Book: Data Modeling with NoSQL and DynamoDB

Regarding the empty string and binary values: https://aws.amazon.com/about-aws/whats-new/2020/05/amazon-dy...

(Disclosure: I work for AWS on DynamoDB and on this)

lbruckon Readings in Database Systems, 5th Edition (2015)

I like "Architecture of a Database System" by Stonebraker, Hamilton, and Hellerstein (http://db.cs.berkeley.edu/papers/fntdb07-architecture.pdf) for an overview and then "Transaction Processing: Concepts and Techniques" by Gray and Reuter (https://www.amazon.com/Transaction-Processing-Concepts-Techn...) for the storage-side of things. Granted these are a little old (especially G&R) so extra thought must be given for modern hardware (memory, CPU performance, processor counts, network, disks, etc) as well as distributed processing, replication, and consensus.