Boundary, Second Edition (eISBN 978-1-62579-545-8) contains the novel Boundary followed by an eleven page scene deleted from Chapter Two, a four page Deep Background of the Aliens of Boundary which gives the background behind the alien's society and internal conflicts, four full color images of Nike by Keith Morrison, and seven full color cover concepts by Kurt Miller.

The text of the novel itself is not changed, but matches that of the original publication.

To date there has only been an eBook edition of the Second Edition.

If it is decided that there is not a sufficient difference between the contents of the original and Second Editions to justify separate entries, and that they should be combined into one, do note that the Canonical Name will need to be changed for the entry for the Second Edition. Please do retain the section of this disambiguation notice that describes how the Second Edition differs from the first.