Econometric Analysis of Panel Data by Badi Baltagi is a good introductory book on panel data analysis. Wiley is the publishers. Jeffrey. Wooldridge's Econometric Analysis of Cross Section and Panel Data is a more advanced treatment.
In my opinion you can start with Introductory Econometrics: A Modern Approach by Jeffrey Wooldbridge (chapters 13 and 14) and after that read Econometric Analysis of Cross-Section and Panel Data also by Wooldridge, or Baltagi's book as already suggested.