The e-book is available on Amazon. From the link below you can get it anywhere in the world. The e-book is also for country-specific Amazon units. You should try it out there if you find it more convenient.
The book is also available on Google Play if you prefer to make your purchase there.
There is an interesting agreement I entered into – it concerns academic libraries. Soon the availability of the books will be significantly improved in this area as well. More information is coming when this can be disclosed. Stay tuned.