Move book.adoc to root

Makefile

@@ -16,13 +16,13 @@ ASCIIDOC_FLAGS = \
 all: $(PDF_PATH) $(EPUB_PATH)
 
 $(PDF_PATH): $(ASCIIDOC_FILES) $(FIGURES) Makefile metadata.yaml | output
-	asciidoctor-pdf source/book.adoc $(ASCIIDOC_FLAGS) \
+	asciidoctor-pdf book.adoc $(ASCIIDOC_FLAGS) \
 		-o $@ \
 		-r asciidoctor-diagram \
 		-r asciidoctor-mathematical
 
 $(EPUB_PATH): $(ASCIIDOC_FILES) $(FIGURES) Makefile metadata.yaml | output
-	asciidoctor-epub3 source/book.adoc $(ASCIIDOC_FLAGS) \
+	asciidoctor-epub3 book.adoc $(ASCIIDOC_FLAGS) \
 		-o $@ \
 		-r asciidoctor-diagram \
 		-r asciidoctor-mathematical

README.md

@@ -67,9 +67,9 @@ make clean
 
 ## Structure
 
-The entry point of the book is [book.adoc](source/book.adoc).
+The entry point of the book is [book.adoc](book.adoc).
 
-The [book.adoc](source/book.adoc) consists of 3 sections:
+The [book.adoc](book.adoc) consists of 3 sections:
 
 - The [front matter](source/front_matter.adoc)
 - The [body](source/body.adoc)

book.adoc

@@ -10,10 +10,10 @@ Alexandra Thompson <name.lastname@foo.bar>
 :icons: font
 :front-image: backgrounds/cover.png
 :back-image: backgrounds/back-cover.png
-:imagesdir: ../figures
+:imagesdir: figures
 
-include::front_matter.adoc[]
+include::source/front_matter.adoc[]
 
-include::body.adoc[]
+include::source/body.adoc[]
 
-include::back_matter.adoc[]
+include::source/back_matter.adoc[]