Yeah, I bought it yesterday, just finished reading it. He should of turned it into a series. The ending left me wanting more.
You never know. He might. Aside from my original "Catalyst", each of my current series have started as single stories. It was only months after I finished/posted them, that I saw a novel way of continuing the story. Often it's not enough to simply continue it, the new books need to convey something on their own, so the book will stand on it's own, otherwise it's merely 'more of the same'.
Case in point: My first Great Death book was about how people would react to an apocalyptic event (instead of treating the death of billions cavalierly). When I finished with it, I couldn't see writing 'yet another' post-apocalyptic book, as I had nothing to add. It was only months later it occurred to me: 'After having watched all their family and friends die, EVERYONE would respond different afterwards', which led to the second book. After that book, I asked, what would the protagonists bring to the table, once he was out of the picture.
In other cases, I often END my stories, either by killing the character ("Catalyst") or by making it impossible for them to return ("Stranded In a Foreign Land" and "Singularity"). But, with "Stranded", it occurred to me the bad guy aliens never seen in the first book could return, producing an entirely new book.