The library was open, with all manner of amusing books.—Ruskin.

According to the approved usage of Modern English, each one of the above adjectives would have to be changed to the singular, or the nouns to the plural.

History of this construction.

The reason for the prevalence of these expressions must be sought in the history of the language: it cannot be found in the statement that the adjective is made plural by the attraction of a noun following.

At the source.

In Old and Middle English, in keeping with the custom of looking at things concretely rather than in the abstract, they said, not "all kinds of wild animals," but "alles cunnes wilde deor" (wild animals of-every-kind). This the modern expression reverses.

Later form.

But in early Middle English the modern way of regarding such expressions also appeared, gradually displacing the old.

The result.

Consequently we have a confused expression. We keep the form of logical agreement in standard English, such as, "This sort of trees should be planted;" but at the same time the noun following kind of is felt to be the real subject, and the adjective is, in spoken English, made to agree with it, which accounts for the construction, "These kind of trees are best."