Detailed programmer's Guide on creating contracts for Ethereum Crowd Sale: an ICO contract, Token contract and helper contracts. The code is well explained and ready to be deployed. All "standard" ICO features are present, including multiple beneficiaries, bonus tokens and whitelisting. If the industry uses more than one approach, both are documented, for example, you will learn how to place Token in the same file with ICO contract or in different files. In addition to being a good tutorial, the book can serve as a reference guide, saving you from searching the net for undocumented or poorly documented details.