Most of those beat sheet type things are good and informative and, in my opinion, slated more towards the experienced writer as an extra tool. Snyders is one of the best (but I'm biased toward that publisher) I think for newer writers (and that has nothing to do with age) those things can get pretty confining if they're taken as gospel. Guidelines, yes, wonderful, fabulous guidelines there to help and fall back on. But gospel? I find that iffy.
Everything you can read gives you more tools, of that there is no doubt in my mind, but the thing... again, in my mind... is that you use what is good for you and discard that which is not. Otherwise it's just formula and you can insert different names and countries and everything. It's just same ol same ol.
Besides, like the old adage says, rules are made to be broken. BUT, you need to know them to do the best job.
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