This is the fourth/final installment in the Ware Tetralogy. Overall, I enjoyed the series - though it is a bit bizarre. It is a lot of fun, though it has its serious sides if you pay attention.
Here, in Realware, some characters return from earlier installments and some new ones are introduced. Basically, the alien named Shimmer from Freeware (the third book) returns along with others from her corner of the universe. We meet their god, Om, and learn of/see some adventures in hyperspace. Om gives humans a device called an alla that allows the owner to make just about anything from thin air - this does cause chaos. Then there is a hopeful ending.
This fourth book is not as good as the earlier three, but it does close things out for the series. Some people may not find the closure here all that satisfying - I'm on the fence.
Sorry, this is the best I can do. :)
