Racial Motifs

Motifs are books mandatory for crafting styles that aren't from your starting race.

Motifs are purely cosmetic, but worth farming if they're rare or expensive enough. They often drop in value extremely fast after they've been released, so only a few are worth farming for.

The recial motifs are the least rare, on the exception of the imperial one. And some are rare but not extremely expensive anymore, like Daedric Motif and Ancient Elf Motif.

The Racial motifs
Mer Races:
 * High Elf Motif
 * Dark Elf Motif
 * Wood Elf Motif
 * Orc Motif

Human Races:
 * Nord Motif
 * Redguard Motif
 * Bretton Motif
 * Imperial Motif

Beastmer
 * Argonian Motif
 * Kajit Motif

Rare motifs

 * Barbarian Motif
 * Primal Motif
 * Ancient Elf Motif
 * Daedric Motif

There's also style motifs, most of them found in dlc areas, bit some can be found in the Crafting Writs or Daily Quests, like Glass Motif Fragments and the mercenary motif

Thieves guild DLC motifs

 * Outlaw Motifs
 * Thieves Guild Motifs
 * Abah's Watch Motifs
 * Drom' Athra Motifs

Orsinium DLC Motifs

 * Ancient Orc Motifs
 * Trinimac Motifs
 * Malacath Motifs

Dark Brotherhood DLC Motifs

 * Assassins League Motifs
 * Dark Brotherhood Motifs
 * Minotaur Motifs
 * Order Of The Hour Motifs

Clock Work City DLC Motifs

 * Apostle Motifs
 * Clockwork Motifs
 * Ebonshadow Motifs