diff --git a/.github/workflows/print.yml b/.github/workflows/print.yml
index ea98cda..b488419 100644
--- a/.github/workflows/print.yml
+++ b/.github/workflows/print.yml
@@ -2,9 +2,12 @@ name: Print Book
 
 on:
   push:
-    branches: [ "main" ]
+    branches:
+      - main
+      - 'feat/*'
   pull_request:
-    branches: [ "main" ]
+    branches:
+      - main
 
 jobs:
 
@@ -14,9 +17,17 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        # rebases and merge verifying
+        fetch-depth: 0
+
     - name: print book inside docker container
       run: make inside
 
+    - name: verify commit signature
+      # ensure that every commit has a signature
+      run: git log -1 --show-signature
+
     - name: export pdf
       uses: actions/upload-artifact@v4
       with:
diff --git a/Makefile b/Makefile
index 6b2b1cb..791b3c6 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,8 @@
 IMAGE_NAME = facile:latest
 CONTAINER_NAME = builder
 
+ARTEFACT = ./tmp/book.pdf
+
 docker-build:
 	docker build -t $(IMAGE_NAME) .
 
@@ -18,5 +20,8 @@ clean:
 
 inside: clean docker-run
 	mkdir -p tmp
-	docker cp $(CONTAINER_NAME):/work/output/main.pdf ./tmp/book.pdf
+	docker cp $(CONTAINER_NAME):/work/output/main.pdf ${ARTEFACT}
 	docker cp $(CONTAINER_NAME):/work/output/main.log ./tmp/book.log
+
+quick: inside
+	xdg-open ${ARTEFACT}
diff --git a/book/chapters/01_einleitung.tex b/book/chapters/01_einleitung.tex
index 25562f0..586d3db 100644
--- a/book/chapters/01_einleitung.tex
+++ b/book/chapters/01_einleitung.tex
@@ -1,9 +1,39 @@
 \chapter{Einleitung}
-\selectlanguage{ngerman}
-Dies ist die deutsche Einleitung.
 
-\selectlanguage{latin}
-Brevis est velit, sed verae litterae manent.
+\begin{center}
+\includegraphics[width=0.8\textwidth]{images/intro.png}
+\end{center}
 
-\selectlanguage{ngerman}
-Weitere Hinweise auf die Edition.
+% \textbf{Mater:} Salve, parva.\\
+% \textbf{Parva:} Salve, Mater.\\
+
+% \textbf{Mater:} Ecce pila.\\
+% \textbf{Parva:} Pila!\\
+
+% \textbf{Mater:} Pila magna est.\\
+% \textbf{Parva:} Magna pila.\\
+
+% \textbf{Mater:} Ludamus pila.\\
+% \textbf{Parva:} Ludere pila!\\
+
+% \textbf{Mater:} Pilam volvo.\\
+% \textbf{Parva:} Pila venit!\\
+
+% \textbf{Mater:} Pilam pulsas.\\
+% \textbf{Parva:} Pulsare pila.\\
+
+% \textbf{Mater:} Pila longe it.\\
+% \textbf{Parva:} Vale, pila!\\
+
+% \textbf{Mater:} Bene lusisti, parva.\\
+
+% \selectlanguage{ngerman}
+% Dies ist die deutsche Einleitung.
+
+% \selectlanguage{latin}
+% Brevis est velit, sed verae litterae manent.
+
+% \selectlanguage{ngerman}
+% Weitere Hinweise auf die Edition.
+
+\newpage
diff --git a/book/chapters/03_abschluss.tex b/book/chapters/03_abschluss.tex
index 93be15c..52e2e30 100644
--- a/book/chapters/03_abschluss.tex
+++ b/book/chapters/03_abschluss.tex
@@ -1,3 +1,23 @@
 \chapter{Abschluss}
-\selectlanguage{ngerman}
-Schlussbemerkungen und Danksagung.
+
+\begin{center}
+\includegraphics[width=0.8\textwidth]{images/outro.png}
+\end{center}
+
+% Lepus: Salve!
+% Ursus: Salve!
+% Anas: Salve!
+% Lepus: Esurio.
+% Ursus: Ego quoque.
+% Anas: Ego quoque.
+% Lepus: Carotam habeo.
+% Ursus: Mel habeo.
+% Anas: Panem habeo.
+% Lepus: Partimur?
+% Ursus: Ita!
+% Anas: Ita!
+% Lepus: Hoc bonum est.
+% Ursus: Amici boni sunt.
+% Anas: Amici sumus!
+
+\newpage
diff --git a/book/images/intro.png b/book/images/intro.png
new file mode 100644
index 0000000..9c955d1
Binary files /dev/null and b/book/images/intro.png differ
diff --git a/book/images/outro.png b/book/images/outro.png
new file mode 100644
index 0000000..1012f09
Binary files /dev/null and b/book/images/outro.png differ
diff --git a/book/main.tex b/book/main.tex
index e3f06d9..cea27e9 100644
--- a/book/main.tex
+++ b/book/main.tex
@@ -17,6 +17,7 @@
 \usepackage{microtype}
 
 \usepackage{graphicx}
+\graphicspath{{book/images/}}
 
 \usepackage{biblatex}
 \addbibresource{bibliography.bib}