diff --git a/doc/src/figures/cover.pdf b/doc/src/figures/cover.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..a79998ae01d2ef911f460ff0f926b398c9322fa2
Binary files /dev/null and b/doc/src/figures/cover.pdf differ
diff --git a/doc/src/figures/cover.png b/doc/src/figures/cover.png
new file mode 100644
index 0000000000000000000000000000000000000000..ddbae731ea483422128565614c180c57c6a81d37
Binary files /dev/null and b/doc/src/figures/cover.png differ