diff --git a/RCTAppleHealthKit/RCTAppleHealthKit+Queries.h b/RCTAppleHealthKit/RCTAppleHealthKit+Queries.h
index a5b95085525cda6d88e578d68e57d760544e95b8..a1653a2ec2e5e7eb1d9d1bd587f81f36b516a2be 100644
--- a/RCTAppleHealthKit/RCTAppleHealthKit+Queries.h
+++ b/RCTAppleHealthKit/RCTAppleHealthKit+Queries.h
@@ -38,4 +38,10 @@
                                          limit:(NSUInteger)lim
                                     completion:(void (^)(NSArray *, NSError *))completionHandler;
 
+
+
+- (void)fetchSleepCategorySamplesForPredicate:(NSPredicate *)predicate
+                                   limit:(NSUInteger)lim
+                                   completion:(void (^)(NSArray *, NSError *))completion;
+
 @end
diff --git a/RCTAppleHealthKit/RCTAppleHealthKit+Queries.m b/RCTAppleHealthKit/RCTAppleHealthKit+Queries.m
index 7b8613442b5bdad140c774294eda9100157816fe..d29ca8660d6aa9cca63315f79a1591b9272c241a 100644
--- a/RCTAppleHealthKit/RCTAppleHealthKit+Queries.m
+++ b/RCTAppleHealthKit/RCTAppleHealthKit+Queries.m
@@ -106,6 +106,102 @@
 }
 
 
+
+
+
+
+
+
+
+- (void)fetchSleepCategorySamplesForPredicate:(NSPredicate *)predicate
+                                   limit:(NSUInteger)lim
+                                   completion:(void (^)(NSArray *, NSError *))completion {
+
+
+    NSSortDescriptor *timeSortDescriptor = [[NSSortDescriptor alloc] initWithKey:HKSampleSortIdentifierEndDate
+                                                                       ascending:false];
+
+
+    // declare the block
+    void (^handlerBlock)(HKSampleQuery *query, NSArray *results, NSError *error);
+    // create and assign the block
+    handlerBlock = ^(HKSampleQuery *query, NSArray *results, NSError *error) {
+        if (!results) {
+            if (completion) {
+                completion(nil, error);
+            }
+            return;
+        }
+
+        if (completion) {
+            NSMutableArray *data = [NSMutableArray arrayWithCapacity:1];
+
+            dispatch_async(dispatch_get_main_queue(), ^{
+
+                for (HKCategorySample *sample in results) {
+
+                    HKCategoryType *catType = sample.categoryType;
+                    NSInteger *val = sample.value;
+
+                    // HKQuantity *quantity = sample.quantity;
+                    // double value = [quantity doubleValueForUnit:unit];
+
+                    NSString *startDateString = [RCTAppleHealthKit buildISO8601StringFromDate:sample.startDate];
+                    NSString *endDateString = [RCTAppleHealthKit buildISO8601StringFromDate:sample.endDate];
+
+                    NSDictionary *elem = @{
+                            @"value" : @(( (float) *val )),
+                           @"catType" : catType.identifier,
+                            @"startDate" : startDateString,
+                            @"endDate" : endDateString,
+                    };
+
+                    [data addObject:elem];
+                }
+
+                completion(data, error);
+            });
+        }
+    };
+
+    // HKSampleQuery *query = [[HKSampleQuery alloc] initWithSampleType:quantityType
+    //                                                        predicate:predicate
+    //                                                            limit:lim
+    //                                                  sortDescriptors:@[timeSortDescriptor]
+    //                                                   resultsHandler:handlerBlock];
+
+    HKCategoryType *categoryType =
+    [HKObjectType categoryTypeForIdentifier:HKCategoryTypeIdentifierSleepAnalysis];
+
+    // HKCategorySample *categorySample =
+    // [HKCategorySample categorySampleWithType:categoryType
+    //                                    value:value
+    //                                startDate:startDate
+    //                                  endDate:endDate];
+
+
+   HKSampleQuery *query = [[HKSampleQuery alloc] initWithSampleType:categoryType
+                                                          predicate:predicate
+                                                              limit:lim
+                                                    sortDescriptors:@[timeSortDescriptor]
+                                                     resultsHandler:handlerBlock];
+
+
+    [self.healthStore executeQuery:query];
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
 - (void)fetchCorrelationSamplesOfType:(HKQuantityType *)quantityType
                                  unit:(HKUnit *)unit
                             predicate:(NSPredicate *)predicate