Programmer's Guide to FORTRAN 90

I use this book over the Compaq fortran 90 language manual sometimes. Examples are easy to follow and the writing is very clear. Many examples. There is a nice section at the back on obsolete fortran 77 conventions, and their replacements. It's a nice compact book too - you don't realize how much information it contains because it's not enormous and heavy. I recommend it to anybody

After looking through most of the available texts, we chose this this book to teach a course on Fortran-90 to scientists and engineers at NASA. It is especially helpful to programmers with a good understanding of Fortran-77 who want to make the transition to this powerful revision of the language. The book covers the most useful new features (array processing, allocateable memory, derived types, encapsulation) very thoroughly. The writing is generally clear, cogent, and understandable. The only thing lacking is a complete treatment of language intrinsic functions, for which you need the large (and expensive) language handbook.