If you're interested in a different angle to the 60s period, this one is probably for you. As is the blog, which I regularly take a look at. They regularly feature "niche" things, shall we say, that you won't find anywhere else. A while ago David even interviewed Paul Brown from Adaptor clothing and he regularly features music.
He also benefits from a photographer. Which I certainly don't and it certainly brings the undeniably visual look of Mod alive when someone who knows their way around a camera is in on board.
By the way, if you did want to buy the book, clicking on the pic (or link below) will take you to Amazon and a small donation will go towards this blog. The price is the same (I can't change that I'm afraid!) - but at least some of your dosh will go towards Mod things and not some corporate finance bill.