Origin (Scales ‘N’ Spells Book 1) by AJ Sherwood & Jocelynn Drake: Not-so-extinct, Shifter dragons, mages, fated mates, secret clans, epic libraries, hurt/comfort, age gap, not that Alric cares, magical heritage, mechanical engineers being BAMF, grumpy dragon kings being protective of their cute mates, really the cuteness is downright criminal, we might need a firehose for these two.
This book is Free on February 26, 2023