some progress

app/Models/Author.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Author extends Model
+{
+    protected $fillable = [
+        'name',
+        'slug',
+        'bio',
+    ];
+
+    /**
+     * The books that belong to the author.
+     */
+    public function books()
+    {
+        return $this->belongsToMany(Book::class, 'author_book')->withTimestamps();
+    }
+}

app/Models/Book.php

@@ -16,6 +16,14 @@ class Book extends Model
         'category_id',
     ];
 
+    /**
+     * Use slug for route model binding and URL generation.
+     */
+    public function getRouteKeyName(): string
+    {
+        return 'slug';
+    }
+
     /**
      * Get the category that owns the book.
      */
@@ -31,4 +39,36 @@ class Book extends Model
     {
         return $this->hasOne(Summary::class);
     }
+
+    /**
+     * The authors that belong to the book.
+     */
+    public function authors()
+    {
+        return $this->belongsToMany(Author::class, 'author_book')->withTimestamps();
+    }
+
+    /**
+     * Users who saved this book to their readlist.
+     */
+    public function savedByUsers()
+    {
+        return $this->belongsToMany(User::class, 'readlist_items')->withTimestamps();
+    }
+
+    /**
+     * Reports submitted for this book's summary.
+     */
+    public function reports()
+    {
+        return $this->hasMany(SummaryReport::class);
+    }
+
+    /**
+     * Reviews left by users for this book's summary.
+     */
+    public function reviews()
+    {
+        return $this->hasMany(SummaryReview::class);
+    }
 }

app/Models/SummaryReport.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class SummaryReport extends Model
+{
+    protected $fillable = [
+        'user_id',
+        'book_id',
+        'summary_id',
+        'reason',
+        'details',
+        'status',
+    ];
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function book()
+    {
+        return $this->belongsTo(Book::class);
+    }
+
+    public function summary()
+    {
+        return $this->belongsTo(Summary::class);
+    }
+}

app/Models/SummaryRequest.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class SummaryRequest extends Model
+{
+    protected $fillable = [
+        'user_id',
+        'gutenberg_id',
+        'title',
+        'notes',
+        'status',
+    ];
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+}

app/Models/SummaryReview.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class SummaryReview extends Model
+{
+    protected $fillable = [
+        'user_id',
+        'book_id',
+        'summary_id',
+        'rating',
+        'comment',
+    ];
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function book()
+    {
+        return $this->belongsTo(Book::class);
+    }
+
+    public function summary()
+    {
+        return $this->belongsTo(Summary::class);
+    }
+}

app/Models/User.php

@@ -45,4 +45,20 @@ class User extends Authenticatable
             'password' => 'hashed',
         ];
     }
+
+    /**
+     * Books saved by the user in their readlist.
+     */
+    public function readlistBooks()
+    {
+        return $this->belongsToMany(Book::class, 'readlist_items')->withTimestamps();
+    }
+
+    /**
+     * Reviews authored by the user.
+     */
+    public function reviews()
+    {
+        return $this->hasMany(SummaryReview::class);
+    }
 }