Johll's Investigating Chemistry - ChemPortal Version

The last time I ran my forensic science course I used the electronic only version of this textbook using the ChemPortal feature from the publisher.  As this course is primarily populated with non-science majors, this proved to be a cost effective method of gaining access to this textbook that would be used only one semester.
The online version has the full text in e-book format.  That alone is good.  It also includes forensic simulations which students commented were interesting and informative.  That feature is something to consider.
It appears to still be in beta mode so there are some inconsistencies, but if you plan on using the text, check out the Chemportal version as well.
-Dwight TshudyGordon College, Wenham, MA