Thanks for the kind comments!
Parcelpostguy - When more space is needed for albums, the books on the right side get replaced.

landoquakes - The big blue on the bottom was acquired several years ago at an auction at the Rocky Mountain Philatelic Library. It's all Latin America and I haven't gotten around to breaking it down yet.
I was planning to build drawers for the open sections in the bottom, but my wife suggested adding doors instead to increase the storage space so I'm probably going to do that this week.