I almost had that, except for the library ladder, in my old house. I had a loft office over the master bedroom. Their were stairs down to that floor, adjoining what amounted to an aviary with glass patio doors at ground level to the backyard. Across the wall opposite from the backyard was a sort of bridge with floor to ceiling book shelves. The loft itself had views in all four directions, including San Francisco Bay to the west, and in addition to my desk, a window seat and a Swedish-style metal pedestal fireplace. When we downsized I took 35 boxes of books to the local library's used book store, and kept an equal number.
My current office is smaller. But I do have two 6 foot high bookcases and a 5 foot bookcase -- both overflowing -- and a four foot shelving above a portion of the desk. And most of the boxes of books I brought with me still stacked in the garage.
