Sidepane Premium Theme by Themify
The unique characteristic of Sidepane theme is its fixed sidebar. It makes navigating easier. Your readers never need to scroll up and down to browse around. Readers can jump between posts with the Sidepane's navigation dock on the right side. Sidepane theme is great for sites with clean and minimal sidebar.
Sidepane demo: http://themify.me/demo/themes/sidepane/