The best replacement for bookshelves is floorstanders.

The best alternatives to bookshelves are rated as following:
★★★★★  floorstanders
★★★  bookcases
★★★  towers
★★★  book shelves
★★  bookshelves
★★  floorstanding

Your alternative for bookshelves is not listed? Suggest!
Speaking about bookshelves, one probably shouldn't forget about desk.

Other search terms related to bookshelves and their ratings are:
★★★★★ desk
★★★★ cabinets
★★★ cabinet base
★ fireplace
★ built in desk
You have in mind a companion for bookshelves and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of bookshelves in all years. Click on graph for more.
bookshelves
floorstanders
bookcases