The book is unread and in excellent condition; no marks or stains.
The slipcase is also near-fine.
Please see all photos.

The Floating Admiral is a collaborative detective novel between fourteen members of the Detection Club and written in 1931.  The twelve chapters of the story were each written by a different author, listed in one of my photos, but including Agatha Christie and Dorothy L. Sayers.  G.K. Chesterton contributed a prologue.