Not sure about books, but there are sites like adsrsounds.com which have (paid) video tutorial courses for learning music production with DAWs, and I think videos are the best medium for learning this sort of software because of the combination of audio and visual. I'm sure there must be other similar sites, but this is the only one I have any experience of. YouTube would also probably be a useful resource, but you'd have to search through a load of cruft before finding something useful.

Just bear in mind that writing music with DAWs requires the same level of commitment (time, effort and financial) as learning a traditional instrument.

edit: just seen the sibling comment, so as I suspected there are plenty of resources available! :)