The concept for the book is very nice: adding everyday objects. The problem comes in the way the drawings are done. On one page, we see a truck carrying three tigers. On the next page, a truck carrying two more tigers follows the first. Below is a billboard with the equation: 3+2=5. Enter the problem. Whereas in the equation the number 3 is on the left, in the illustration the picture of the truck with the three tigers is on the right side. Similarly, the 2 in the equation is to the right of the 3, in the drawing the truck with the two tigers is on the far left. It would have been *much* nicer if the layout of the equation and the layout of the truck corresponded to one another.
On a finer point, because in the USA (and obviously in other parts of the world) we read from left to right it's consistent to teach children to work this way, too. Having children jump around to count first the three tigers on the right, then jump left to count the remaining two can cause unnecessary confusion.
To be fair, above the equation are pictures of the corresponding number of tigers, so the tigers can be counted/viewed there also. Still, the awkward positioning is unfortunate.
The rhyming text is adequate, but nothing special. The illustrations are very nice. They manage to be interesting and colorful without distracting from the actual story.
From the rave reviews I read on the MathStart series, I expected more.