I find the River Cottage book the "safest" as it really helps to tell you which of the edible species could be confused with poisonous, and how to easily tell them apart. That one increased my confidence a lot. The only other one I have is Roger's Mushrooms - excellent book and more in depth.
bland - bit late now but a great pic! For future reference the chantarelles definitely aren't, the "St.Georges" are Common yellow brittlegills (Russulas), edible and slightly peppery. The "blewit" is another brittlegill, possibly a Charcoal burner.
Get some books and go on a guided foray - well worth it at this time of year.