Left-dislocation
Left-dislocation is a construction akin to topicalization. Contrary to what the name might suggest, no overt movement is involved. The element which is placed in front of the sentence is associated with some kind of pronoun:
(i) that booki, I don't think he has read iti
This construction is also known as a Hanging Topic Left Dislocation.
Link
Utrecht Lexicon of Linguistics
References
- Smits, R.J.C. 1989. The relative and cleft constructions of the Germanic and Romance languages, doct. diss. KUB, Tilburg, Dordrecht: Foris, 1988.