Cubic Metaplectic Forms and Theta Functions The book is an introduction to the theory of cubic metaplectic forms on the 3 dimensional hyperbolic space and the authors research on cubic metaplectic forms on special linear and symplectic groups of rank 2. The topics include: Kubota and Bass Milnor Serre homomorphisms cubic metaplectic Eisenstein series cubic theta functions Whittaker functions. A special method is developed and applied to find Fourier coefficients of the Eisenstein series and cubic theta functions. The book is intended for readers with beginning graduate level background interested in further research in the theory of metaplectic forms and in possible applications