Neptune's Brood is a science fiction novel by British author Charles Stross, set in the same universe as Saturn's Children, but thousands of years later and with all new characters.

In Neptune's Brood, set in AD 7000, Homo sapiens has been resurrected three times, but remains insignificant and is known as the "Fragile".

[4] In the novel, "humanity" is used for the "mechanocyte"-based metahuman successor life forms, vastly improved over the original androids.

The novel presents itself as an extended first-person report by Krina Alizond-114, created by the "incalculably wealthy" Sondra Alizond-1 to be a scholar of accountancy practice historiography.

[8] Publishers Weekly[2] wrote: As always, Stross feels like the smartest guy in the room, pushing the boundaries of identity and humanity while offering up what may be the first epic tale of futuristic macroeconomics.According to Kirkus Reviews:[5] If you begin by thinking that a narrative about banking, debt and accountancy might be dull, Stross will quickly disabuse you—there’s always a mad glint in his eye, even when he’s explaining some seriously weird and alluring concepts.It was described by Saxon Bullock as follows in SFX:[9] The level of invention is as impressive as ever, with virtually every page crammed to bursting with incredible concepts, while the slow-burning mystery turns out to be well-crafted and gripping in the extreme.