diff --git a/book/chapters/dem.ipynb b/book/chapters/dem.ipynb
index 0ff64a8..4c56af8 100644
--- a/book/chapters/dem.ipynb
+++ b/book/chapters/dem.ipynb
@@ -250,7 +250,9 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Extract various terrain features from the DEM, such as slope, aspect, curvature, northness, and eastness, and save the results."
+    "Extract various terrain features from the DEM, such as slope, aspect, curvature, northness, and eastness, and save the results.\n",
+    "\n",
+    "Note: Install gdal using conda `conda install gdal`"
    ]
   },
   {
diff --git a/book/chapters/fsCA.ipynb b/book/chapters/fsCA.ipynb
index a8e2d54..2fff4b7 100644
--- a/book/chapters/fsCA.ipynb
+++ b/book/chapters/fsCA.ipynb
@@ -40,7 +40,9 @@
    "metadata": {},
    "source": [
     "## 3.5.2 Procedure\n",
-    "This script is designed to download MODIS snow cover data from NASA servers, convert the downloaded HDF files to GeoTIFF format, and then merge these GeoTIFF tiles into a single file for each day within a specified date range."
+    "This script is designed to download MODIS snow cover data from NASA servers, convert the downloaded HDF files to GeoTIFF format, and then merge these GeoTIFF tiles into a single file for each day within a specified date range.\n",
+    "\n",
+    "Note: Install gdal using conda `conda install gdal`"
    ]
   },
   {