How new is new enough for HTML/CSS?

@Ray.H,

When I responded to your post above at about 3am last night, I got threads mixed up.

Per my other ramblings, I posted a solution in my other thread for anyone curious…

https://www.sitepoint.com/community/t/flexbox-vs-inline-block/354432/15

Am still curious if anyone can tell me if the SitePoint books that I bought are any good.

Thanks.