Online:House Hlaalu Style (collection)
The UESPWiki – Your source for The Elder Scrolls since 1995
Hlaalu Style is a collection of 14 books that make up part of the Crafting Motifs library. Reading the chapters teaches you the Hlaalu Style for crafting. Chapters (or rarely the entire book) can be obtained by pickpocketing NPCs or looted from Safeboxes and Thieves Troves in Vvardenfell.
Learning all 14 crafting motifs earns the achievement Hlaalu Style Master.