diff --git a/extract_thinker/document_loader/document_loader_spreadsheet.py b/extract_thinker/document_loader/document_loader_spreadsheet.py
index bfe6744..0c28e8a 100644
--- a/extract_thinker/document_loader/document_loader_spreadsheet.py
+++ b/extract_thinker/document_loader/document_loader_spreadsheet.py
@@ -1,6 +1,6 @@
 from operator import attrgetter
 import openpyxl
-from typing import Union
+from typing import List, Union
 from io import BytesIO
 from extract_thinker.document_loader.cached_document_loader import CachedDocumentLoader
 from cachetools import cachedmethod
@@ -14,19 +14,40 @@ def __init__(self, content=None, cache_ttl=300):
     @cachedmethod(cache=attrgetter('cache'), key=lambda self, file_path: hashkey(file_path))
     def load_content_from_file(self, file_path: str) -> Union[str, object]:
         workbook = openpyxl.load_workbook(file_path)
-        sheet = workbook.active
-        data = []
-        for row in sheet.iter_rows(values_only=True):
-            data.append(row)
+        data = {}
+        for sheet_name in workbook.sheetnames:
+            sheet = workbook[sheet_name]
+            sheet_data = [self._process_row(row) for row in sheet.iter_rows(values_only=True)]
+            data[sheet_name] = sheet_data
         self.content = data
-        return self.content
+        return {"data": self.content, "is_spreadsheet": True}
 
     @cachedmethod(cache=attrgetter('cache'), key=lambda self, stream: hashkey(id(stream)))
     def load_content_from_stream(self, stream: Union[BytesIO, str]) -> Union[str, object]:
         workbook = openpyxl.load_workbook(filename=BytesIO(stream.read()))
-        sheet = workbook.active
-        data = []
-        for row in sheet.iter_rows(values_only=True):
-            data.append(row)
+        data = {}
+        for sheet_name in workbook.sheetnames:
+            sheet = workbook[sheet_name]
+            sheet_data = [self._process_row(row) for row in sheet.iter_rows(values_only=True)]
+            data[sheet_name] = sheet_data
         self.content = data
-        return self.content
+        return {"data": self.content, "is_spreadsheet": True}
+
+    def _process_row(self, row):
+        if all(cell in (None, '', ' ') for cell in row):
+            return ["\n"]
+        return [cell if cell not in (None, '', ' ') else "" for cell in row]
+
+    def load_content_from_file_list(self, file_paths: List[str]) -> List[Union[str, object]]:
+        data_list = []
+        for file_path in file_paths:
+            data = self.load_content_from_file(file_path)
+            data_list.append(data)
+        return data_list
+
+    def load_content_from_stream_list(self, streams: List[BytesIO]) -> List[Union[str, object]]:
+        data_list = []
+        for stream in streams:
+            data = self.load_content_from_stream(stream)
+            data_list.append(data)
+        return data_list
diff --git a/extract_thinker/extractor.py b/extract_thinker/extractor.py
index a7c40fc..7888d6d 100644
--- a/extract_thinker/extractor.py
+++ b/extract_thinker/extractor.py
@@ -15,7 +15,7 @@
 from extract_thinker.document_loader.loader_interceptor import LoaderInterceptor
 from extract_thinker.document_loader.llm_interceptor import LlmInterceptor
 
-from extract_thinker.utils import get_file_extension, encode_image
+from extract_thinker.utils import get_file_extension, encode_image, json_to_formatted_string
 import yaml
 import litellm
 
@@ -276,6 +276,8 @@ def _extract(self,
 
         if content is not None:
             if isinstance(content, dict):
+                if content["is_spreadsheet"]:
+                    content = json_to_formatted_string(content["data"])
                 content = yaml.dump(content)
             messages.append({"role": "user", "content": "##Content\n\n" + content})
 
diff --git a/extract_thinker/utils.py b/extract_thinker/utils.py
index 1df2561..d43011f 100644
--- a/extract_thinker/utils.py
+++ b/extract_thinker/utils.py
@@ -100,3 +100,12 @@ def get_file_extension(file_path):
     _, ext = os.path.splitext(file_path)
     ext = ext[1:]  # remove the dot
     return ext
+
+
+def json_to_formatted_string(data):
+    result = []
+    for sheet, rows in data.items():
+        result.append(f"##{sheet}")
+        for row in rows:
+            result.append(','.join(map(str, row)))
+    return '\n'.join(result)
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 46542e2..1592d67 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "extract_thinker"
-version = "0.0.8"
+version = "0.0.9"
 description = "Library to extract data from files and documents agnositicaly using LLMs"
 authors = ["Júlio Almeida <enoch3712@gmail.com>"]
 readme = "README.md"