The product is a textbook titled “Nonlinear Estimation” by Gavin J.S. Ross, published by Springer in 1990 as part of the Springer Series in Statistics. It covers the subject area of Mathematics, specifically focusing on Probability & Statistics and Stochastic Processes, with a focus on mathematical analysis.
Linear Estimation by Thomas Kailath (Hardcover 2000) Statistics Probability Math
You will find that this textbook has a comprehensive bibliography for further study.