Very funny and / but a little light

I bought this book after seeing the teaser on youtube and have read the feedback from readers: I understood that I amuse myself ... and I was not disappointed. The book is based on the assumption (shipped in the introduction) that a successful career is based solely on the fayotage with his superior; It revolves around a series of situations at work (need a raise, be prepared to get married, take a vacation when all colleagues are on deck, etc.) it evokes in 2 pages each, explaining how to handle these situations by flattery. The author's style and the absurdity of some of its recommendations are very, very funny. In fact, if you've seen the videos on youtube, you had an excellent overview of the rest of the book. Reading is shipped in 3 hours, very pleasant, when I smiled / laughed at each page (this must be my style of humor).
However, I will like to know if the author really thinks what he wrote, in which case his incessant dessert humor about it, or its purpose was simply to entertain (in which case it is successful) and to come forward .
A book that seems to hesitate constantly between the temptation of entertainment and a claim to a more serious background ... Just make your own opinion on the matter.