Maybe Clever Algorithms: Nature-Inspired Programming Recipes[1]. These techniques might not be useful to everybody, all the time, but they can be very handy in places.
Edit:
A couple of other suggestions.
Managing Gigabytes: Compressing and Indexing Documents and Images[2]
Mining of Massive Datasets[3]
Algorithm Design Manual[4]
Network Algorithmics[5]
Neural Network Design[6]
I think all of these fall into the category of "Won't be applicable to everyone, but can be good for those who need this kind of stuff."
Edit:
A couple of other suggestions.
Managing Gigabytes: Compressing and Indexing Documents and Images[2]
Mining of Massive Datasets[3]
Algorithm Design Manual[4]
Network Algorithmics[5]
Neural Network Design[6]
I think all of these fall into the category of "Won't be applicable to everyone, but can be good for those who need this kind of stuff."
[1]: https://github.com/clever-algorithms/CleverAlgorithms
[2]: https://people.eng.unimelb.edu.au/ammoffat/mg/
[3]: http://www.mmds.org/
[4]: https://www.amazon.com/Algorithm-Design-Manual-Steven-Skiena...
[5]: https://www.amazon.com/Network-Algorithmics-Interdisciplinar...
[6]: https://hagan.okstate.edu/NNDesign.pdf