Hard Science Fiction - Old School

I write two types of hard science fiction. The first uses lightly extrapolated science, usually in a near-term setting, and includes such titles as the novel L4 Station, and the novella series MarsX. The second uses highly extrapolated science, which I will call speculative hard science fiction, usually in a distant time, and includes the Mach Series, the Null Infinity Series, and the Time Series. They are both based on current science research or technology that I've read about, but with a different emphasis on the degree of difficulty in implementation. Extrapolated hard science fiction needs only the engineering, though that may be years/decades away. Speculative hard science fiction needs more research, maybe further development of theory and might be decades/centuries away. My style of writing could be considered big idea and adventure with a touch of romance (sometimes). One reviewer compared my writing to Isaac Asimov's writing. I love Asimov, and I think that's a fair comparison in the scope of the work, importance of ideas, and general optimism, but I do think I handle characterization differently, maybe because it interests me more. My latest extrapolated hard science fiction releases are L4 Station, and the MarsX series. My latest speculative hard science fiction releases are The Realm and the Brane World series. Human-Generated-Content.