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.
Most decent graphics packages will be capable of conversion between GIF and JPEG, for example, to jpeg. JBuilder mobile toolkit also provides a facility to perform this conversion. Alternatively try the image search in google if you just want any image - take care with the size of the image!