I just saw this on my Amazon browsing. I have seen a lot of posts asking for a point of a view from a happy one and done parent and perhaps this is the book you are looking for.

I admit I only read the sample but I am considering trying the rest being I'm an only child myself.

http://www.amazon.com/gp/product/B00A281004/ref=s9_simh_gw_p351_d0_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=02GMGSB2NJRVR81Q22SY&pf_rd_t=101&pf_rd_p=1688200382&pf_rd_i=507846