diff --git a/README.md b/README.md
index 94f4e6f..8589def 100644
--- a/README.md
+++ b/README.md
@@ -3,28 +3,92 @@ Python Pandas extensions for pandas dataframes
 
 
 # Usage
-
 ```
 import pandas_ext as px
+```
+
+## CSV
 
+By default, pandas will natively read to s3 but won't write to s3.
+```
 px.read_csv
 px.to_csv
 
+```
+## Excel
+
+By default, pandas will natively read to s3 but won't write to s3.
+
+To write to xls:
+```bash
+pip install pandas_ext[xls]
+```
+
+To write xlsx:
+```bash
+pip install pandas_ext[xlsx]
+```
+
+## Gdrive
+By default, pandas does not read/write to Gdrive. 
+
+### For G Suite administrators
+At the organization level, one must do the necessary installation and
+ deployment of the [gdrive lambda service](https://github.com/richiverse/gdrive-lambda/) to get this to work.
+
+You will have to create a service account that shares your G Apps domain with the following APIs enabled:
+
+- Google Drive
+
+- Google Sheets
+
+From there you must download the p12 credentials file and reference it in your settings.yml when deploying the gdrive service.
+
+### For Gdrive clients
+Once that is complete, you must share the folder you are interested in reading/writing to the service account email you've received from your administrator. 
+
+Locally, for client access you must set the `GDRIVE_URL` and `GDRIVE_KEY` in your projects environment variable in order to talk to
+the gdrive lambda service.
+
+
+```
 px.read_gdrive
 px.to_gdrive
+```
 
+## Parquet
+By default, pandas ~does not read/write to Parquet~. This has been added in pandas version 24 and my methods will eventually update to use them but still allow writing to s3.
+
+```
 px.read_parquet
 px.to_parquet
+```
+
+## Spectrum
+to_spectrum is unique to pandas_ext. 
 
+```
 px.to_spectrum
+```
 
+## Salesforce
+salesforce methods are unique to pandas_ext.
+
+```
 px.read_sfdc
 px.sfdc_metadata
 px.patch_sfdc
 px.async_patch_sfdc
+```
+
+## SQL service
 
+```
 px.read_sql
 px.list_backends
 
+## XML
+Pandas doesn't natively support writing to XML format.
+```
 px.to_xml
 ```
diff --git a/pandas_ext/__init__.py b/pandas_ext/__init__.py
index 34cd4d0..33fac32 100644
--- a/pandas_ext/__init__.py
+++ b/pandas_ext/__init__.py
@@ -1,5 +1,5 @@
 """Versioning kept here."""
-__version__ = '0.4.12'
+__version__ = '0.4.13'
 __license__ = "MIT"
 
 __title__ = "pandas_ext"
@@ -14,6 +14,7 @@
 
 from .amazon_spectrum import to_spectrum
 from .csv import to_csv
+from .excel import to_excel
 from .gdrive import read_gdrive, to_gdrive
 from .parquet import read_parquet, to_parquet
 from .sfdc import (
@@ -28,6 +29,7 @@
 del amazon_spectrum
 del common
 del csv
+del excel
 del gdrive
 del parquet
 del sfdc
diff --git a/pandas_ext/excel.py b/pandas_ext/excel.py
index c2b57b3..79fb76b 100644
--- a/pandas_ext/excel.py
+++ b/pandas_ext/excel.py
@@ -24,5 +24,6 @@ def to_excel(df: pd.DataFrame, file_path: str, engine='', **kwargs) -> None:
         with open(tmp_file, 'rb') as source, s3.open(file_path, 'wb') as dest:
             dest.write(source.read())
         os.remove(tmp_file)
+        return
 
     return df.to_excel(file_path, **kwargs)
diff --git a/setup.py b/setup.py
index 0579167..0d0e991 100644
--- a/setup.py
+++ b/setup.py
@@ -60,6 +60,7 @@ def find_meta(meta):
     version=find_meta("version"),
     license=find_meta("license"),
     install_requires=read("requirements/requirements.in"),
+    extras_require=dict(xls=["xlwt"], xlsx=["openpyxl", "xlsxwriter"]),
     long_description=README,
     packages=PACKAGES,
     classifiers=CLASSIFIERS,