D. J. Albers, G. L. Alexanderson and C. Reid. Editors. More Mathematical People: Contemporary Conversations. Harcourt Brace Jovanovich. 1990, 375 pp., 231 illustrations, $29.95.R. J. Baston and M. G. Eastwood. The Penrose Transform. Clarendon Press. 1989, 213 pp., £25.A. Bejancu. Finsler Geometry and Applications. Ellis Horwood. 1990, 195 pp., £35C. A. Berenstein and R. Gay. Complex Variables: An Introduction. Springer. 1991, 665 pp., DM128.F. A. Berezin and M. A. Shubin. The Schrödinger Equation. Kluwer. 1991, 555 pp., £136.M. Black. Harmonic Maps into Homogeneous Spaces. Longman. 1991, 92 pp., £14.W. C. Brown. Matrices and Vector Spaces. Marcel Dekker. 1991, 328 pp., $49.75.P. M. Cohn. Algebraic Numbers and Algebraic Functions. Chapman an