Terrific opportunity to get science fiction with good science at a bargain price
The German publisher Springer has an impressive set of science fiction titles written by scientists (with a few science fiction-related non-fiction) - the only problem with them is that they are usually priced like textbooks.
However, they currently have an unbelievably good value offer, running to 28 September 2016. They have three bundles of e-books, one with 6 titles, another with 12 and another with 16. Each bundle has a minimum price - and you can decide how your payment is spread between Springer and charity.
Remarkably, the 6 e-book bundle costs just $1 (around £0.76) - though you can pay as much more as you like, bearing in mind the charity contribution. Add another 6 e-books for a minimum of $8 (£6.06) or the full set of 16, which includes the chunkier non-fiction, for $15 (£11.36) or more.