A really superb book - I was introduced to the story in BBC childrens hour in the 1930s I am now 78 years old and still enjoy it, it is at the opposite pole to the "Nature red in tooth and Claw" for which you should read Williamson's Wonderful Books, or as they are known in the Trade WWB's.
It is extremely anthropomorphic, but so full of the imagined or otherwise delights of yesteryear. For children or those who can dream a bit.
ANYTHING by Philip Jose Farmer is good, his approach to the Mystical is opposite to Clarke, he does not seek to rationalise in a dogmatic way, but rather lays out his wares for all to judge and appraise, and as the Victorians use to say "It's a Rattleing good Yarn"
Seems a bit dated now, but none the less, it is a good study of all these modern "man goes back in time meets whatdoyoucall Saurus" type movies. Still a good read though.
Hard To Read. Film was better and that was a bit Blah.