This book is quit good for data compression. It covers a lot of topics.
But for developing your own code, you may need some additional books. For example, DSP using Matlab and wavelets should be a good one.
The book has clarity and is well written.
In the wavelet compression chapter there are few errors.
If you go through the derivations you can spot the errors
1) Equation 15.33 should be multiplied by -1.
2) Equation 15.53 should be c(j,k) = Sigma(h(l - 2k) * c(j + 1,l))