I have indeed much enjoyed the back and forth dialogue between young CJ and his grandmother. And unlike readers who have been faulting Matt de la Pena for penning their conversations in a non standard American vernacular, as a linguist, I do much appreciate the representation of language as primarily oral and thus and yes not as universally standardised, as this does not only add both colour and authenticity to the narrative of Last Stop on Market Street, but more importantly, it also underlines that ALL language (except perhaps certain artificially created lingoes such as Esperanto) originally were and generally still are dialects of multiple variation and that it is in fact these dialects, these oral vernaculars that both enable, that cause language change, language development and evolution, and NOT what is generally considered the written norm (in other words, without the various parlances of the people(s), there would also not be for example standard written English, German, French, Italian, Spanish etc.).
But while I have definitely enjoyed the general narrational set-up of Last Stop on Market Street and do appreciate CJ's grandmother pointing out the many positives of his obviously inner city neighbourhood, and that being friendly, having a social conscience (with the two of them taking a bus after church to volunteer at a local soup kitchen) are generally more important and essential than material wealth such as owning vehicles, iPods and the like, I also tend to think that the grandmother is at times just a bit too insistent on knowing one's "place" in society and not striving to achieve more. Because while I do happen to agree with the message that too much materialism is not all that inherently wonderful, the grandmother's attitude seems to almost suggest that CJ should not even dare to wish that his family had a car, that wanting, that desiring an iPod is somehow even very much wrong in and of itself. And with that salient latter fact in mind, I do (and my general enjoyment of the textual presentation of Last Stop on Market Street quite notwithstanding) kind of fault Matt de la Pena for verbally hitting us readers over our collective heads with his ideals of anti-materialism, of seeing beauty even in run-down communities and neighbourhoods, of promoting social responsibility (I mean, these are ALL philosophies with which I happen to most heartily and even very much adamantly AGREE, but the lack of displayed subtlety and textual nuances does really bother me a bit, as it kind of makes me feel as though I am reading a sermon). And is a somewhat preachy sermon on the evils of materialism and that one needs to see beauty everywhere, that being socially aware and conscious is a positive, truly worth the 2016 Newbery Medal for Last Stop on Market Street?
Now with regard to Christian Robinson's accompanying illustrations (which also won a 2016 Caldecott Honour designation for Last Stop on Market Street), while I do absolutely adore and love the colours used, and how the city in both its positives and negatives is generally so vibrantly and emotionally, glowingly depicted, I do find the presented human figures a bit too one-dimensional and emotionally stagnant, a bit too cartoony for my personal tastes. However and that all being said, Robinson's pictorial renderings do work very well with Matt de la Pena's narrative, both reflecting and at times expanding on the latter's printed words (and I can thus much understand how many have found Last Stop on Market Street a successful and wonderful combination of text and images, although I for one do personally rather wish that Christian Robinson's illustrations were a trifle less naive and move detailed, more rounded and expansive in visual scope). And sorry, I did and do find that white head covering CJ's grandmother is wearing a trifle strange and distracting, as it almost feels as though it has been added by the illustrator as somewhat of an after-thought (it just feels a bit artificial and superimposed, and if that white headdress is supposed to actually represent the grandmother's hair, well to my eyes, it sure does not really look like hair).