You really need to use Classic Myths to Read Aloud. It is a required book because all the questions and vocabulary words are taken from it. Sorry, this is one you really shouldn't substitute unless you are prepared to do lots of scrambling.
Each collective myth book not only has different selections, but different versions as well. You would also be missing one of the best things about the Classic Myths book - the author gives a review at the end of each myth on the words that have come to us (that we use every day) from that myth. This was one of the reasons this book was chosen - none of the other books offer this benefit. Russell also gives pronunciations for the difficult names and places covered in each myth.