Place the Images
Create a new document. I created a 8×10 300dpi document.
Place (File> Place) the photos you would like to include in the stack of photos.
The image should be placed in the document with the transform controls activated. Adjust the image size. Hold the Shift key to maintain the aspect ratio while scaling the image
Repeat step 2 and 3 for all the photos you would like to include with the artwork.
Use the Transform tool (Image> Transform> Rotate or Ctrl+T) to rotate the photos. You can arrange the photos by moving the layers to different positions in the layers pallet. I moved the photo of the cup to the top layer so that it’s the top photo of the stack.