Why wouldn't you simply send directly from coinbase to your book? You are paying an extra fee by sending it to Blockchain? When you buy from Coinbase they charge you a fee, when you send it to Blockchain, they charge a fee, then when you send it to your book of choice they charge you another fee. Bitcoin fees have got out of control lately, used to cost maybe 1 -2% to send to a book, now they a charging over 10% in some cases. This is why an honest, reputible local is worth their weight in gold!
If anyone has any info that I am missing, plz let me know, Thanks!