Search for the Sun
The five protagonists are hired by a mysterious man/machine to search for the computer system that runs a completely redesigned solar system involving concentric Dyson spheres. Their quest takes them inwards from the "mars sphere" towards the sun, which no-one has seen in generations since they live on the outsides of the spheres.
To add more interest, there are unknown players trying to both help and hinder them.
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Colin Kapp
Derek Ivor Colin Kapp, 1928–2007, was an Electronics Engineer and was able to draw upon this experience for many of his Science Fiction stories.
He began his career with Mullard Electronics then specialised in electroplating techniques, eventually becoming a freelance consultant engineer.
Cageworld
Cageworld consists of four books. The current recommended reading order for the series is provided below.

