diff --git a/README.md b/README.md
index 20c83cd..fcdd251 100644
--- a/README.md
+++ b/README.md
@@ -127,7 +127,7 @@ expr        = ( 'not ' | '! ' )? (value | comp | in_array)
 comp        = value ('==' | '!=' | '<' | '>' | '<=' | '>=' | '=~') value
 value       = (jsonpath | childpath | number | string | boolean | regpattern | null | length)
 length      = (jsonpath | childpath) '.length'
-in_array    = value 'in' '[' value (',' value)* ']'
+in_array    = value 'in' ( '[' value (',' value)* ']' | jsonpath )
 ```
 
 ¹`var_name`: the regex roughly translates to "any valid JavaScript variable
@@ -220,6 +220,7 @@ JsonPath | Result
 `$['store']` | The store.
 `$..book[*][title, 'category', "author"]` | title, category and author of all books.
 `$..book[?(@.author in [$.authors[0], $.authors[2]])]` | All books by "Nigel Rees" or "Herman Melville".
+`$..book[?(@.author in $.authors)]` | All books written by an author in the authors list.
 `$.store.book[?(@.category == 'fiction' and @.price < 10 or @.color == "red")].price` | Books of fiction with a price lower than 10 or something with of color red. (`and` takes precedence to `or`)
 
 See more examples in the `./tests/Galbar/JsonPath` folder.
diff --git a/src/Galbar/JsonPath/Expression/BooleanExpression.php b/src/Galbar/JsonPath/Expression/BooleanExpression.php
index a02f5d8..af9a8c4 100644
--- a/src/Galbar/JsonPath/Expression/BooleanExpression.php
+++ b/src/Galbar/JsonPath/Expression/BooleanExpression.php
@@ -47,7 +47,7 @@ private static function booleanExpressionAnds(&$root, &$partial, $expression)
             if (preg_match(Language\Regex::BINOP_COMP, $subexpr, $match)) {
                 $result = Comparison::evaluate($root, $partial, $match[1], $match[2], $match[3]);
             } elseif (preg_match(Language\Regex::BINOP_IN_ARRAY, $subexpr, $match)) {
-                $result = InArray::evaluate($root, $partial, $match[1], $match[2]);
+                $result = InArray::evaluate($root, $partial, $match[1], end($match));
             } else {
                 $result = Value::evaluate($root, $partial, $subexpr);
             }
diff --git a/src/Galbar/JsonPath/Expression/InArray.php b/src/Galbar/JsonPath/Expression/InArray.php
index 85be597..c7301a3 100644
--- a/src/Galbar/JsonPath/Expression/InArray.php
+++ b/src/Galbar/JsonPath/Expression/InArray.php
@@ -2,6 +2,8 @@
 
 namespace JsonPath\Expression;
 
+use JsonPath\Language;
+
 class InArray
 {
     const SEPARATOR = ',';
@@ -17,13 +19,38 @@ public static function evaluate(&$root, &$partial, $attribute, $listExpression)
     private static function prepareList(&$root, &$partial, $expression)
     {
         if (strpos($expression, self::SEPARATOR) === false) {
-            return [Value::evaluate($root, $partial, trim($expression))];
+            if ($expression[0] === Language\Token::ROOT){
+                list($result, $_) = \JsonPath\JsonPath::subtreeGet($root, $root, $expression);
+                if (!$_) {
+                    $result = reset($result);
+                }
+                return $result;
+            }
+            else if ($expression[0] === Language\Token::CHILD) {
+                $expression[0] = Language\Token::ROOT;
+                list($result, $_) = \JsonPath\JsonPath::subtreeGet($root, $partial, $expression);
+                if (!$_) {
+                    $result = reset($result);
+                }
+                return $result;
+            }
+
+            return [Value::evaluate($root, $partial, self::unwrapExpression($expression))];
         }
 
         return array_map(
             function ($value) use ($root, $partial) { return Value::evaluate($root, $partial, trim($value)); },
-            explode(self::SEPARATOR, $expression)
+            explode(self::SEPARATOR, self::unwrapExpression($expression))
         );
     }
+
+    private static function unwrapExpression($expression) {
+        if ($expression[0] === Language\Token::SELECTOR_BEGIN
+            && $expression[strlen($expression) - 1] === Language\Token::SELECTOR_END
+        ) {
+            $expression = substr($expression, 1, -1);
+        }
+        return trim($expression);
+    }
 }
 
diff --git a/src/Galbar/JsonPath/Language/Regex.php b/src/Galbar/JsonPath/Language/Regex.php
index c574391..ef4f9ee 100644
--- a/src/Galbar/JsonPath/Language/Regex.php
+++ b/src/Galbar/JsonPath/Language/Regex.php
@@ -38,7 +38,7 @@ class Regex
     const EXPR_STRING = '/^(?:\'(.*)\'|"(.*)")$/';
     const EXPR_REGEX = '/^\/.*\/i?x?$/';
     const BINOP_COMP = '/^(.+)\s*(==|!=|<=|>=|<|>|=\~)\s*(.+)$/';
-    const BINOP_IN_ARRAY = '/^(.+)\s*in\s*\[(.+)\]$/';
+    const BINOP_IN_ARRAY = '/^(.+)\s*in\s*(\[.+\]|[\$|@]\..+)$/';
     const BINOP_OR = '/\s+(or|\|\|)\s+/';
     const BINOP_AND = '/\s+(and|&&)\s+/';
     const OP_NOT = '/^(not|!)\s+(.*)/';
diff --git a/tests/Galbar/JsonPath/JsonObjectTest.php b/tests/Galbar/JsonPath/JsonObjectTest.php
index 92abd29..6e87a9e 100644
--- a/tests/Galbar/JsonPath/JsonObjectTest.php
+++ b/tests/Galbar/JsonPath/JsonObjectTest.php
@@ -896,6 +896,53 @@ public function testSmartGetProvider()
                     )
                 ),
                 "$..book[?(@.author in [$.authors[0], $.authors[2]])]"
+            ),
+            array(
+                array(
+                    array(
+                        "category" => "reference",
+                        "author" => "Nigel Rees",
+                        "title" => "Sayings of the Century",
+                        "price" => 8.95,
+                        "available" => true,
+                    )
+                ),
+                '$..book[?(@.author in [$.authors[*]])]'
+            ),
+            array(
+                array (
+                    array (
+                        'category' => 'reference',
+                        'author' => 'Nigel Rees',
+                        'title' => 'Sayings of the Century',
+                        'price' => 8.95,
+                        'available' => true,
+                    ),
+                    array (
+                        'category' => 'fiction',
+                        'author' => 'Evelyn Waugh',
+                        'title' => 'Sword of Honour',
+                        'price' => 12.99,
+                        'available' => false,
+                    ),
+                    array (
+                        'category' => 'fiction',
+                        'author' => 'Herman Melville',
+                        'title' => 'Moby Dick',
+                        'isbn' => '0-553-21311-3',
+                        'price' => 8.99,
+                        'available' => true,
+                    ),
+                    array (
+                        'category' => 'fiction',
+                        'author' => 'J. R. R. Tolkien',
+                        'title' => 'The Lord of the Rings',
+                        'isbn' => '0-395-19395-8',
+                        'price' => 22.99,
+                        'available' => false,
+                    ),
+                ),
+                '$..book[?(@.author in $.authors[*])]'
             )
         );
     }