Free verse is a poetic form that does not contain specific rhyme scheme or meter. It is "free" from formal rules. The poet creates the poem's form.
The novel is a long work written in prose: basic written language without meter. According to wordiq.com, the novel began in the 18th century.
A free verse novels combines the style of free verse and places it in the novel form. An example of a free verse novel is "Aleutian Sparrow" by Karen Hesse.