diff --git a/readme.md b/readme.md
index c54e378..0962385 100644
--- a/readme.md
+++ b/readme.md
@@ -78,12 +78,6 @@ Keep in mind that [functions are objects too](https://developer.mozilla.org/en-U
 
 Returns `true` for any object with a `.then()` and `.catch()` method. Prefer this one over `.nativePromise()` as you usually want to allow userland promise implementations too.
 
-##### .generator(value)
-
-Returns `true` for any object that implements its own `.next()` and `.throw()` methods and has a function definition for `Symbol.iterator`.
-
-##### .generatorFunction(value)
-
 ##### .map(value)
 ##### .set(value)
 ##### .weakMap(value)
@@ -127,6 +121,24 @@ Returns `true` for instances created by a ES2015 class.
 
 ##### .typedArray(value)
 
+##### .inRange(value, range)
+
+Check if `value` (number) is in the given `range`. The range is an array of two values, lower bound and upper bound, in no specific order.
+
+```js
+is.inRange(3, [0, 5]);
+is.inRange(3, [5, 0]);
+is.inRange(0, [-2, 2]);
+```
+
+##### .inRange(value, upperBound)
+
+Check if `value` (number) is in the range of `0` to `upperBound`.
+
+```js
+is.inRange(3, 10);
+```
+
 
 ## FAQ
 
@@ -157,6 +169,12 @@ The most common mistakes I noticed in these modules was using `instanceof` for t
 - [is-empty-iterable](https://github.com/sindresorhus/is-empty-iterable) - Check if an Iterable is empty
 
 
+## Created by
+
+- [Sindre Sorhus](https://github.com/sindresorhus)
+- [Giora Guttsait](https://github.com/gioragutt)
+
+
 ## License
 
-MIT © [Sindre Sorhus](https://sindresorhus.com)
+MIT
diff --git a/test.js b/test.js
index 4194c0c..89b4a41 100644
--- a/test.js
+++ b/test.js
@@ -10,7 +10,11 @@ const ErrorSubclassFixture = class extends Error {};
 const types = new Map([
 	['undefined', undefined],
 	['null', null],
-	['string', '🦄'],
+	['string', [
+		'🦄',
+		'hello world',
+		''
+	]],
 	['number', [
 		6,
 		1.4,
@@ -319,3 +323,38 @@ test('is.typedArray', t => {
 	t.false(m.typedArray([]));
 	t.false(m.typedArray({}));
 });
+
+test('is.inRange', t => {
+	const x = 3;
+
+	t.true(m.inRange(x, [0, 5]));
+	t.true(m.inRange(x, [5, 0]));
+	t.true(m.inRange(x, [-5, 5]));
+	t.true(m.inRange(x, [5, -5]));
+	t.false(m.inRange(x, [4, 8]));
+	t.true(m.inRange(-7, [-5, -10]));
+	t.true(m.inRange(-5, [-5, -10]));
+	t.true(m.inRange(-10, [-5, -10]));
+
+	t.true(m.inRange(x, 10));
+	t.true(m.inRange(0, 0));
+	t.true(m.inRange(-2, -3));
+	t.false(m.inRange(x, 2));
+	t.false(m.inRange(-3, -2));
+
+	t.throws(() => {
+		m.inRange(0);
+	});
+
+	t.throws(() => {
+		m.inRange(0, []);
+	});
+
+	t.throws(() => {
+		m.inRange(0, [5]);
+	});
+
+	t.throws(() => {
+		m.inRange(0, [1, 2, 3]);
+	});
+});