Hello all When you need to learn topic such as PHP programming for example or other programming topics then you will found books and tutorial help you in more approach
1-Books to learn by example approach
2- Books to learn as tutorials
3- Books provided with source codes
4- books for Beginners and other for advanced
Bot in OpenERP there less example and more less in internet I ask first why ? second if there any one intend to write such books I think there is many people ready to buy such book and do not want to take a training course thank in advance