Anything by Wooldridge. For example "Introduction to econometrics" combined with "Economic analysis of cross section and panel data". Also, "A practical guide to using panel data" by Longhi and Nandi.
Fully agree with T.M.Napiórkowski & E.Khalili - the introductory textbook of J. Wooldridge is the main text which I recommend to consult if dealing with introductory level econometrics (cross sectional, time series, or panel data) - but also D.Gujarati, C.Brooks, C.Dougherty, ...
Second level in anything - there is a wide range of titles, but after the introductory level everyone must develop "individual sense" about what suits her/him well...:-))