diff --git a/docs/amg4psblas_1.0-guide.pdf b/docs/amg4psblas_1.0-guide.pdf
index 878886bf..39cf217f 100644
Binary files a/docs/amg4psblas_1.0-guide.pdf and b/docs/amg4psblas_1.0-guide.pdf differ
diff --git a/docs/src/userguide.tex b/docs/src/userguide.tex
index 55c1fe73..d6919a9d 100644
--- a/docs/src/userguide.tex
+++ b/docs/src/userguide.tex
@@ -12,7 +12,12 @@
             pdfpagelabels,
             colorlinks,
             citecolor=red,
-            linkcolor=blue]{hyperref}
+            linkcolor=blue,
+            pdfauthor={Pasqua D'Ambra, Fabio Durastante, Salvatore Filippone},
+            pdftitle={Algebraic MultiGrid Preconditioners Package based on PSBLAS, V. 1.0},
+            pdfsubject={MultiGrid Parallel Preconditioners Package},
+            pdfkeywords={Parallel Numerical Software, Algebraic MultiGrid Preconditioners, Sparse Iterative Solvers, PSBLAS, MPI},
+            ]{hyperref}
 \usepackage{html}
 \usepackage{ifthen}
 \usepackage{graphicx}