These are two more in O'Reilly's Pocket Reference series. There is not very much to say about them which is why I am writing this rather than burden someone else with the review task.
I wish O'Reilly would parcel books like these with their more substantial 'In a Nutshell' corresponding volumes. That way you would have the fuller reference for normal use but could slip the pocket reference into your pocket when called upon to work somewhere else.
There is nothing wrong with either of these books, but I cannot see any compelling reason for most to buy them.