DOWNLOAD (Sanskrit-English, 8MB, OCR-layer in English):
English annotation by Vishnudut1926: Two key Granthas of Tenkalai (The Southern Branch of Shree Ramanuja Sampradaya, Shree Pillai LokAcharya) in 1 compilation.
Stellar edition by S. SatyaMurthi Ayyangar Gwalior, very much recommended.
Trilingual (Hindi-Sanskrit-English) edition of "Shree TattvaTraya" by Shree Pillai LokAcharya also exists, see here - #"The Tattvatraya Of Lokacarya - A Treatise On Visistadvaita Vedanta" - an English and Hindi translation B.M. Awasthi, 1973