I don't think they quite meet your £2 requirement, but they're not much worse -- Try the Solar Clipper series from Nathan Lowell. The early ones are definitely YA, but the later ones less so. The first is
Quarter Share, and the last one in the series (
Owner's Share) was just released on Amazon this morning.
These are easy reads, no heavy violence, basic Space Opera. Also available as
free Podiobooks webcasts, read by the author. Actually, they started life as podcasts, and only later got converted to text.