I came to this one being something of a fan of '70s British comedy, with the film adaptation a fitting time capsule of British working class life in the mid-'70s (lest we forget, it was the most popular film at the box office for the year it was released). The film itself is miles better than the book, mainly because the actors are far more charming than the cardboard cut-outs here, and the supporting cast of British character actors is exemplary.
The book is a lesser experience. It's a series of risque sexual escapades, as author/narrator Timothy Lea takes up window cleaning and a little extra on the side too. Written as a comedy, there's plenty of obvious jokes here, but the most overpowering thing of all is just how sexist and racist it is. Things start out fairly sweet, but by the end the racial terms are being bandied about without hesitation, the women are objectified to the nth degree, there's an undercurrent of misogyny and homophobia, and there's even attempted rape scene thrown in. None of this sits well with a modern reader although you could argue that this is all merely a snapshot of social attitudes in the 1970s. I'm glad we live in more enlightened times.