An average tourist attraction has a short paragraph, no more. Worse, there is almost no useful info. No hours, no address, no tariff indication, nothing! For some sites, there are Internet addresses (and still there is not often), but I will not have internet access on site. As for the restaurant tips, hotel, etc., do not look, there is not one for all Tenerife.
As much print directly some Internet pages! It will probably be better served. Frankly, it seems that this guide was written by surfing the Internet.
And yet this little guide is certainly not the worst of the collection. I ordered along the travel guide book of Portugal and it's even worse!
