describe the theme of three men in a boat ,has jerome succeded to make the book a travel guide of the thames reign

A detailed look at all of the novel's themes can be found at the Gradesaver link provided below.

As for the second part of your question, Three Men in a Boat straddles multiple genres. When the book was published in 1889, critics were not quite sure what to make of it. Superficially at least, it is structured as travel guide. Today, travel guides are often presented as reference works, and are not meant to be read cover-to-cover. In the nineteenth century, however, it was common for works of this genre to be written as one long itinerary. Jerome initially intended Three Men in a Boat to be a serious travel narrative, but his humorous digressions eventually become so prominent that the book was reconceived as a comic novel.