The following content from By Blood We Live is available online in its entirety, either here on this website, or elsewhere on the web. The following are all also available in the By Blood We Live eBook sampler, which you can download below in various formats.
This is Now — Michael Marshall Smith [external link]
After the Stone Age — Brian Stableford [external link]
Peking Man — Robert J. Sawyer [external link]
Exsanguinations — Catherynne M. Valente [external link]
All of the above are also available in the By Blood We Live eBook sampler, which can downloaded from the Baen Webscriptions store, free of charge.