Breton
Breton is a Celtic language closely related to Welsh. It is spoken in Brittany, the French peninsula due south of England. It is the source of original writings on Merlin, King Arthur and other aspects of Celtic mythology.
Colloquial Breton: The Complete Course for Beginners (Colloquial Series (Book Only))Initiation Au Breton Sans Peine (Methode quotidienne Assimil)Assimil Language COurses - Breton sans Peine (Breton for French Speakers) Book only
Colloquial Breton: The Complete Course for ...
by Herve Ar Bihan
$39.95
The best English language introduction to Breton
Initiation Au Breton Sans Peine (Methode qu...
by Fanch Morvannou

Assimil's introduction (in French) to the Breton language
Assimil Language COurses - Breton sans Pein...
$28.95
Once you've completed the Initiation au Breton, this is good for expanding your understanding.
Dic Breton-English/English-Breton Dictionary and Phrasebook (Hippocrene Dictionary and Phrasebook Series)MLS Easy Immersion Breton Lab (MLS Easy Immersion)Talk Now! Breton
Dic Breton-English/English-Breton Dictionar...
by Joseph Conroy
$11.95
A (barely) passable but inexpensive phrasebook and dictionary
MLS Easy Immersion Breton Lab (MLS Easy Imm...

A basic introduction to Breton vocabulary and grammar
Talk Now! Breton
$22.79
Interactive games for learning Breton vocabulary
Breton GrammarBallads And Songs Of BrittanyThe Celtic Languages (Routledge Language Familydescriptions)
Breton Grammar
by Roparz Hemon
$13.95
An English translation of a common Breton grammar
Ballads And Songs Of Brittany
by Tom Taylor
$32.64
Tom Taylor's English version of the Barzaz Breizh - Breton songs about Celtic myths and Christian traditions
The Celtic Languages (Routledge Language Fa...
by Martin J. Ball
$48.10
The definitive guide to the Celtic languages