Orthogonal Decompositions and Integral Lattices Alexei Kostrikin, Pham Huu Tiep E-Book (pdf)

Exponential Sums, Hypergeometric Sheaves, and Monodromy Groups Nicholas M. Katz, Pham Huu Tiep E-Book (pdf)

Quadratic and Higher Degree Forms Krishnaswami Alladi, Manjul Bhargava, David Savitt E-Book (pdf)