Bargain @ $2.99 each for today only (May 14th) from assorted Macmillan imprints (including Tor Books) as a joint Kobo and Amazon Daily Deal promotion in Canada & the US (probably matched in the other stores, too):
The Rithmatist by
Brandon Sanderson (
ISFDB; standalone fantasy YA),
The Emperor's Blades by
Brian Staveley (
ISFDB; 1st in fantasy series),
Scholar by
L. E. Modesitt (
ISFDB, 4th in fantasy series). There's also some extra SFnal books out from the Feiwel & Friends YA imprint:
The Genius by Mexican-American author and film producer
Leopoldo Gout (
ISFDB; technothriller set in a gaming environment) and
Fairest by
Marissa Meyer (
ISFDB; prequel to YA fairy tale-based fantasy series).
Linkage to the lot @
Kobo CA,
Kobo US (has some extra books which are geo-restricted in Canada, including Hilary Mantel's bestselling Tudor historical
Wolf Hall) and
Amazon main
ETA: An additional Tor Teen title showing up at Amazon but glitchy with fluctuating prices at Kobo (you may end up needing to price-match):
Truthwitch by
Susan Dennard (
ISFDB; 1st in YA fantasy series)