There is very little to say about these two books that the title does not already say. They are small and light enough to carry in a pocket without seriously spoiling the cut of your clothes. They are intended as reminders about information that you already know (unless you are familiar with the language in question they will be of no use to you). If you are on the move and prefer to carry your quick reference material in printed form these books are ideal.
Book cover image courtesy of Open Library.