Love this idea for master bath doors. Fabulous solution when space is too tight for a standard hinged door. You can also put furniture on the walls next to this opening, just leaving enough space behind the furniture for the doors to slide.
Built-in bookcase for cookbooks! I just want built in bookcases in every room for books! I'll carry a book from one room to another and have a dedicated shelf for my current read. Although, having dedicated space for cookbooks is smart, too.