diff --git a/src/Entity/Book.php b/src/Entity/Book.php
index 3eec000..d01bfe9 100644
--- a/src/Entity/Book.php
+++ b/src/Entity/Book.php
@@ -128,6 +128,40 @@ public static function getAll(
 
         return $bResponse;
     }
+    /**
+     * Get many books by filter
+     *
+     * @param Bookboon $bookboon
+     * @param array $bookTypes
+     * @param array $filters
+     * @return BookboonResponse<Book>
+     * @throws \Bookboon\Api\Exception\UsageException
+     **/
+    public static function getByFilters(
+        Bookboon $bookboon,
+        array $bookTypes = [self::_OWN_TYPE],
+        array $filters
+    ) : BookboonResponse {
+        $variables = [
+            'bookType' => join(',', $bookTypes),
+        ];
+
+        $variables = array_merge($variables, $filters);
+
+        $bResponse = $bookboon->rawRequest(
+            '/v1/books',
+            $variables,
+            ClientInterface::HTTP_GET,
+            true,
+            Book::class
+        );
+
+        $bResponse->setEntityStore(
+            new EntityStore(static::getEntitiesFromArray($bResponse->getReturnArray()), Book::class)
+        );
+
+        return $bResponse;
+    }
 
     /**
      * @param array $objectArray
diff --git a/src/Entity/Chapter.php b/src/Entity/Chapter.php
new file mode 100644
index 0000000..329488d
--- /dev/null
+++ b/src/Entity/Chapter.php
@@ -0,0 +1,84 @@
+<?php
+
+namespace Bookboon\Api\Entity;
+
+use Bookboon\Api\Bookboon;
+use Bookboon\Api\Client\BookboonResponse;
+use Bookboon\Api\Client\ClientInterface;
+use Bookboon\Api\Exception\BadUUIDException;
+
+class Chapter extends Entity
+{
+    /**
+     * @param Bookboon $bookboon
+     * @param string $authorId
+     * @return BookboonResponse<Chapter>
+     * @throws BadUUIDException
+     * @throws \Bookboon\Api\Exception\EntityDataException
+     * @throws \Bookboon\Api\Exception\UsageException
+     */
+    public static function getByBookId(Bookboon $bookboon, string $bookId) : BookboonResponse
+    {
+        if (Entity::isValidUUID($bookId) === false) {
+            throw new BadUUIDException();
+        }
+
+        $bResponse = $bookboon->rawRequest(
+            "/v1/books/$bookId/chapters",
+            [],
+            ClientInterface::HTTP_GET,
+            true,
+            Chapter::class
+        );
+
+        $bResponse->setEntityStore(
+            new EntityStore(static::getEntitiesFromArray($bResponse->getReturnArray()), Chapter::class)
+        );
+
+        return $bResponse;
+    }
+
+    protected function isValid(array $array) : bool
+    {
+        return isset($array['_id'], $array['duration'], $array['position'], $array['title']);
+    }
+    
+
+    /**
+     * @return string UUID of entity
+     */
+    public function getId() : string
+    {
+        return $this->safeGet('_id');
+    }
+
+    /**
+     * Return position of the chapter.
+     *
+     * @return int position
+     */
+    public function getPosition() : int
+    {
+        return $this->safeGet('position');
+    }
+
+    /**
+     * Return duration of the chapter.
+     *
+     * @return int duration
+     */
+    public function getDuration() : int
+    {
+        return $this->safeGet('duration');
+    }
+
+    /**
+     * Return title of the chapter
+     *
+     * @return string title
+     */
+    public function getTitle()
+    {
+        return $this->safeGet('title');
+    }
+}
diff --git a/src/Entity/TimeTag.php b/src/Entity/TimeTag.php
new file mode 100644
index 0000000..6e750ee
--- /dev/null
+++ b/src/Entity/TimeTag.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Bookboon\Api\Entity;
+
+use Bookboon\Api\Bookboon;
+use Bookboon\Api\Client\BookboonResponse;
+use Bookboon\Api\Client\ClientInterface;
+use Bookboon\Api\Exception\BadUUIDException;
+
+class TimeTag extends Entity
+{
+    /**
+     * @param Bookboon $bookboon
+     * @param string $authorId
+     * @return BookboonResponse<TimeTag>
+     * @throws BadUUIDException
+     * @throws \Bookboon\Api\Exception\EntityDataException
+     * @throws \Bookboon\Api\Exception\UsageException
+     */
+    public static function getByBookId(Bookboon $bookboon, string $bookId) : BookboonResponse
+    {
+        if (Entity::isValidUUID($bookId) === false) {
+            throw new BadUUIDException();
+        }
+
+        $bResponse = $bookboon->rawRequest(
+            "/v1/books/$bookId/timetags",
+            [],
+            ClientInterface::HTTP_GET,
+            true,
+            TimeTag::class
+        );
+
+        $bResponse->setEntityStore(
+            new EntityStore(static::getEntitiesFromArray($bResponse->getReturnArray()), TimeTag::class)
+        );
+
+        return $bResponse;
+    }
+
+    protected function isValid(array $array) : bool
+    {
+        return isset($array['_id'], $array['offset'], $array['name']);
+    }
+    
+
+    /**
+     * @return string UUID of entity
+     */
+    public function getId() : string
+    {
+        return $this->safeGet('_id');
+    }
+
+    /**
+     * Return offset of the timetag.
+     *
+     * @return int offset
+     */
+    public function getOffset() : int
+    {
+        return $this->safeGet('offset');
+    }
+
+    /**
+     * Return name of the chapter
+     *
+     * @return string name
+     */
+    public function getName()
+    {
+        return $this->safeGet('name');
+    }
+}