Added more to the sidebar. Top nav bar got messed up somehow and has a white strip above.
Added JS links to tags list. Works to refresh with tags, but inf scroll doesn't continue to select the appropriate tags. Working on that next.
Sidebar tags/books sort of works. Can select an individual tag/book. Adjusted inf scroll so it triggers less randomly, which also put the loading gif in the correct location.

The tags/books selector doesn't propogate through the inf scroll, nor can you select multiple tags/books. May need to make them a checkbox selector then iterate over each selected.