Blocking and Complementarity in Phonological Theory by Eric Baković. Further details can be viewed and orders can be placed here.
Linguistic Derivations and Filtering: Minimalism and Optimality Theory edited by Hans Broekhuis and Ralf Vogel. Further details can be viewed and orders can be placed here.
The good folks at Equinox are happy to offer you 20% off the retail price of these books. Please quote the discount code BCPT when ordering from their website. This offer is valid until the end of March 2013.