Books on using InDesign for writing & book production

Over the past few years, InDesign has really mutured into the indispensible tool for book production. In addition, it has become a wonderful program in which to write. When we couple this with the newparadigm in publishing: on-demand, we find that the original grail of desktop publishing has been found. You can now publish your books yourself with virtually no capital and easily learnable skills.