Competent, but not nearly as interesting as [b:All You Need Is Kill|6255949|All You Need Is Kill|Hiroshi Sakurazaka|https://d.gr-assets.com/books/1348712730s/6255949.jpg|6439033] or as biting as [b:The Forever War|21611|The Forever War (The Forever War, #1)|Joe Haldeman|https://d.gr-assets.com/books/1386852511s/21611.jpg|423]. And as this review points out beautifully, there’s a lot of fridge logic going on.