diff --git a/book.h b/book.h
index 88b44d1..447fea6 100644
--- a/book.h
+++ b/book.h
@@ -24,6 +24,7 @@
 #define BOOK_H
 
 #include <stdio.h>
+#include <eb/font.h>
 
 /*
  * Types
@@ -40,12 +41,27 @@ typedef struct {
     Book_Block text;
 } Book_Entry;
 
+typedef struct {
+    unsigned char bitmap[EB_SIZE_WIDE_FONT_48];
+} Book_Glyph;
+
+typedef struct {
+    Book_Glyph* glyphs;
+    int         glyph_count;
+    int         glyph_size;
+    int         glyph_wide;
+} Book_Font;
+
 typedef struct {
     char*       title;
     Book_Block  copyright;
+
     Book_Entry* entries;
     int         entry_count;
     int         entry_alloc;
+
+    Book_Font* fonts;
+    int        font_count;
 } Book_Subbook;
 
 typedef struct {