Ask HN: Books for "Mathematics in Biology"

HNers: could you suggest me a book or two in 'Mathematics in Biology'. Beginners or intermediate is what I am looking at.

I was intrigued by "Essential Mathematical Biology" http://www.amazon.com/reader/185233536X).

I usually pick a book based on amazon ratings. I also pour through HN comments and find it equally rated.(eg: "random walk thru walk street" on amazon vs the comments here at HN)