This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
A book covering 2.x (even 2.0) should serve you well for quite a while. Development is already slowing down, and many of today's devices will not run the upcoming version (2.3, or 3.0, or whatever). Even now, Android 1.5/1.6 have over a third of market share, so targeting 2.x with your app would leave many users behind.