Understanding Bitcoin: Cryptography, Engineering and Economics
Pedro Franco
Web Crawling and Data Mining With Apache Nutch
Zakir Laliwala & Abdulbasit Fazalmehmod Shaikh
Apache Solr High Performance
Surendra Mohan
Building DMZs for Enterprise Networks
Robert J. Shimonski & Will Schmied & V Chang & Thomas W. Shinder
Mastering Bitcoin: Programming the Open Blockchain
Andreas M. Antonopoulos