This book was a free special on Barnes and Noble, and I can see why. It was not very well written and rather sloppily edited in places. It read more like fan-fiction than any serious attempt to interest young children in tigers. A lot of it was repetitive and felt, at least, like it had been taken from some online source and the rest made-up. A lot of it actually read like it was a middle-grade essay. It was free, so you can't complain too much, but caveat emptor! Or in this case, cave-cat emptor?!
While the book gets a lot right, it's also a fount of misinformation. For example, on page 7 (the page number on my tablet in the Nook reader - the book itself has no page numbers), we're told the modern tiger is a descendant of the "saber tooth tiger" but that's not true. Tigers and their closest relatives, snow leopards, broke away from other cat species some three million years ago and are not closely-related to saber-toothed cats (not tigers!) at all - no modern cat is.
One of the things the introduction promises, is to explain why tigers have stripes, and it comes up with the obvious answer that tigers are better camouflaged with stripes than if they were all orange or all black or white. What this book doesn't tell you is that the basic reason for the coloration is that the tiger's skin is that color! If a tiger were shaved, it would not look as pretty, but it would still have the same stripes, and probably would be a lot cooler in the daytime heat!
But the thing which isn't addressed at all is that the tiger tends to be a crepuscular and nocturnal hunter, plus, it sees prey and prey sees it in ways it is hard for us to imagine with our sight, so the tiger's camouflage and hunting habits have to be pictured in a world of poorer daytime vision, better nighttime vision (be it greyscale), and a world inhabited by odors which we cannot even begin to imagine with our amateur and dysfunctional noses!
It's not true to say the tiger can see as well as a human during daytime. It can see as well as it needs to, but it doesn't have the acuity humans have for the simple reason it never evolved in tigers: it wasn't necessary for them to be able to conduct their business, which is hunting, and which is conducted at twilight or at night. During those times of day the tiger can capture six times more light (not "six time greater" as the book has it) than humans because they have six times the number of receptor rods in their retinas - just like your domestic cat does. They also have, like a domestic cat, a tapetum lucidum - essentially a mirror behind the retina which reflects light back onto the retina so they can 'double-dip' as it were. The cost of this is that they have poorer daylight vision - both domestic cats and tigers - and see color poorly if at all as compared with humans.
The "six time greater" spelling/grammar error is repeated in other places in the book in different ways, such as when I read on page 15 that "their black strips...hide them", when it should clearly have read 'black stripes'. There are awkward constructions such as "One form of verbal communication used by tigers is roaring. Other tigers from as far away as two miles can hear the roaring of other tigers." Another instance was "It is not uncommon for there to be a dominant or leader among the cubs."
Contrary to what the book tells us, that "Our current day tigers evolved into a subspecies that existed 25 million years ago," modern tigers have existed for less than two million years. About three million years ago they existed only as an ancestor species that eventually split into snow leopards on the one hand and tigers on the other, so I have no idea where the '25 million' figure comes from, and the book offers no references whatsoever to check.
In conclusion, if your kids absolutely adore tigers and can't get enough of them, and you can get this book free, then go for it, but I can't in good faith recommend it as a useful book on the topic. You should read my other non-fiction review posted today to see how a book on animals should be done.