* [DSL Engineering: Designing, Implementing and Using Domain-Specific Languages](http://dslbook.org) - Markus Voelter
* [Evolving Architectures of FinTech](http://www.oreilly.com/programming/free/evolving-architectures-of-fintech.csp) (email address *requested*, not required)
* [Exploring CQRS and Event Sourcing](https://msdn.microsoft.com/en-us/library/jj554200.aspx) - (EPUB, PDF)
* [Guide to the Software Engineering Body of Knowledge](https://www.computer.org/education/bodies-of-knowledge/software-engineering)
* [Guide to the Software Engineering Body of Knowledge](https://www.computer.org/education/bodies-of-knowledge/software-engineering/v3) (email adddress *requested*)
* [How to Design Programs](http://www.htdp.org)
* [How to Write Unmaintainable Code](http://mindprod.com/jgloss/unmain.html)
* [Kanban and Scrum - making the most of both](http://www.infoq.com/minibooks/kanban-scrum-minibook)
* [Kanban for skeptics](https://leanpub.com/kanbanforskeptics) - Nick Oostvogels *(Leanpub account or valid email requested)*
* [Microservice Databases: Migrating from Relational Monolith to Distributed Data](http://www.oreilly.com/programming/free/migrating-to-microservice-databases.csp) (email address *requested*, not required)
* [Microservices AntiPatterns and Pitfalls](https://www.oreilly.com/programming/free/files/microservices-antipatterns-and-pitfalls.pdf) (PDF)
* [Microservices in Production](http://www.oreilly.com/programming/free/microservices-in-production.csp) (email address *requested*, not required)
* [Microservices vs. Service-Oriented Architecture](https://www.oreilly.com/programming/free/files/microservices-vs-service-oriented-architecture.pdf) (PDF)
* [Migrating to Cloud-Native Application Architectures](https://developers.redhat.com/books/migrating-microservice-databases-relational-monolith-distributed-data/) (email address *requested*) (PDF)
* [Naked objects](http://downloads.nakedobjects.net/resources/Pawson%20thesis.pdf) - Richard Pawson (PDF)
* [OAuth - The Big Picture](https://pages.apigee.com/oauth-big-picture-ebook.html)
* [OAuth - The Big Picture](https://pages.apigee.com/oauth-big-picture-ebook.html) (email address *requested*)
* [Object-Oriented Reengineering Patterns](http://scg.unibe.ch/download/oorp/) - S. Demeyer, S. Ducasse and O. Nierstrasz
* [Practicing Domain-Driven Design - Part 1](https://leanpub.com/Practicing-DDD) - Scott Millett *(Leanpub account or valid email requested)*
* [Android 4 App Development Essentials](http://www.techotopia.com/index.php/Android_4_App_Development_Essentials)
* [Android 5 Programming by Example](https://www.packtpub.com/packt/free-ebook/android-by-example) - Kyle Mew, Packt. (email address *requested*, not required)
* [Android NDK Beginner's Guide - Second Edition](https://www.packtpub.com/packt/free-ebook/android-ndk-beginners-guide) - Sylvain Ratabouil, Packt. (email address *requested*, not required)
* [Android NDK Game Development Cookbook](https://www.packtpub.com/packt/free-ebook/android-ndk-game-development) - Sergey Kosarevsky & Viktor Latypov, Packt. (email address *requested*, not required)
* [Programming from the Ground Up](https://download-mirror.savannah.gnu.org/releases/pgubook/ProgrammingGroundUp-1-0-booksize.pdf) - Jonathan Bartlett (PDF)