The Crime Scene book is good so far. I just finished Practical Homicide Investigation for the third time. For a reference book it reads like a novel to me. The Interview book is a little stale for me. I've got a promotional exam coming up in November so it's study study study.
I love these books! Have you read any of Dr. Henry Lee's?
Have you read any of Kathy Reichs? She has a new one out in HB - just finished the earlier one in PB.