X-link to the Kids/YA megathread since Gwyneth Jones is a multi-award-winning British sf/fantasy author and you might have been picking up the previous installments in this series:
Free from the author via KDP Select @
Amazon:
The Powerhouse by "Ann Halam", YA pseudonym of Gwyneth Jones (
ISFDB,
Wikipedia), a horror-ish installment, 4th in her Ghosts and Other Hauntings series of YA sfnal/supernatural/fantasy thrillers, originally out from Orion in 1997.
Also, if anyone else happens to read French-language books or just wants to try out their language learning skills, Bragelonne's Milady imprint is holding a mostly-1st-in-series sale on selected translated and native francophone titles for $3.99 CAD each, which is really cheap considering that most French publishers rarely discount anything, and the ones I was looking at a couple of weeks ago were still at $8.99.
This sale seems to be good in at least Canada when I look at iTunes (France was €4,99 when I spot-checked a title, but they might have a different selection discounted), and is also available at Kobo (non-couponable).
Linkage for the lot @ Kobo:
Milady &
Bragelonne (there's some serial fiction installments in there at the same price point, but they're easy to spot and ignore, and if you go off the sf/fantasy filter for Milady, there's some paranormal romance-looking urban fantasy translations by Lara Adrian et al. if you're interested).
Among the offerings are translated works by Mercedes Lackey (1st in her Arrows trilogy in the Valdemar series), Jim Butcher (1st in his Harry Dresden series), Arthur C. Clarke w/Stephen Baxter (at the $5.99 mark, you can find a lot more translated solo Clarke), Richard K. Morgan's Altered Carbon (
English-language edition is discounted to $2.99 CAD from Orion in Canada if you want both versions), a bunch of Graham Masterson werewolf horror books, Peter F. Hamilton, Kevin J. Anderson's Hidden Empire (English version was
recently an iTunes UK freebie), James Clemens, Louise Cooper, and a couple of others.
A francophone-native sale title I recommend is Pierre Pevel (
ISFDB,
Wikipedia)'s
Les Lames du Cardinal, 1st in his The Cardinal's Blades trilogy which has been translated and available in English from Gollancz & Pyr, which is basically The Three Musketeers with dragons in it. It's a fun series which I
quite liked when I started reading it in translation a few years back, and now own in its original French in an omnibus paperback and very soon, in this discount e-book for the 1st (the other volumes are still $17.99 CAD).