I know the names of some authors, but not so well that I like them.
I know the names of several authors, but I wouldn't say I like them.
naomiさんの例文は次のように言った方が自然になって良いと思います。
ーI know the names of some authors, but not so well that I like them.
または次のようにも言えます。
ーI know the names of several authors, but I wouldn't say I like them.
「何人かの作家の名前を知っているが、彼らが好きというわけではない」
ご参考まで!