彼の小説は

his novels

→ 彼
phrase Uncommon #19,896
his novels は marks “his novels” as the topic. 小説 can refer to one novel or novels in general; Japanese does not mark it as singular or plural.
JA: 彼の小説はとても人気があります。
EN: His novels are very popular.

彼の小説は全部読んでいます。

I've read all of his novels.

彼の小説は長い間たいへん人気があった。

His novels have been very popular for a long time.

彼の小説はフランス語でもでています。

His novels are also available in French.

彼の小説は私には理解できない。

I can't understand his novels.

彼の小説は両方とも読んでいない。

I haven't read either of his novels.

彼の小説は若者に愛読されている。

His novels are widely read by young people.

彼の小説は、つまらないと思う。

I think his novel is boring.

彼の小説は日本語に翻訳された。

His novel was translated into Japanese.

彼の小説はフランス語版もあります。

His novel is also available in a French edition.

彼の小説は私には難しすぎる。

His novels are too difficult for me.