This was an interesting look at how a "never the same guy twice" Dom might tame a young man suffering from ADHD by taking him as a 24/7 sub. 
 Tackett wasn't really looking for a 24/7 sub because he rarely ever slept with the same guy twice, but he's been feeling his age since the collaring ceremony between two of his friends, now that he sees the real love they share between them, and he thinks he might just want something like that. Only he has no idea how to get to that point. 
 As soon as he sees the man, Micah believes deep down that Tackett can help him become a good sub, even though he's never had a contract with any Dom longer than 3 months. No one can put up with his wandering mind. But Micah is totally focused on not only getting Tackett to train him, but to keep him full-time as well. He's persistent, and Tackett finally gives him a trial period to see if things might work between them. 
 We see things from Micah's and Tackett's perspective throughout the book. From Tackett, we see how he feels like he's bitten off more than he can chew because he's never had a full-time sub and doesn't know if he can be that sort of Master to his naughty Pup who has a hard time focusing. He's not "the perfect Dom" from the outset, and we see his fears of not being able to be what Micah really needs. And we watch him figure it out and come into his own as Micah's owner. 
 From Micah's side, we see how he beats himself up over his inability to focus. (If you liked the treatment of Patrick's ADHD in Amy Lane's Clear Water, this is reminiscent of the same.) But he's so determined that Tackett fits him and will be able to help him. He believes in Tackett so deeply that it tears him up to think that he's not good enough for Tackett because of his "broken brain", and that Tackett might send him away. 
 How they do work it out makes good sense, and you get the feeling that they'll be just fine together in the end. I'm looking forward to reading the next book in the series. 
 ETA: 
 After reading some other reviews, I felt the need to comment on a few things. 
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 Some have commented that they're surprised Tackett didn't research Micah's ADHD. I don't know that I felt it was up to Tackett to try to figure out a diagnosis. I guess that's why I took it with a grain of salt. He was dealing with symptoms instead of the underlying problem, and it worked from that standpoint. 
 For the fact that Tackett didn't remember to do daily discipline properly, it is established early on that while he's been in the scene for 20-odd years, he only does club scenes, not daily interaction with the same person repeatedly. Understanding dominance from one standpoint does not make him a master in the other, and he is shown as doubting his own abilities when it comes to working with a sub 24/7. He's flawed this way on purpose, in my opinion, which is why I had no problem with this from a story standpoint. 
 For the flea market scene, where he was setting Micah up to fail - I'm waffling on how I feel about this one. I think at the time that I felt Tackett was doing it on purpose to show Micah that he had this problem that needed correction, but the more I think about it, the more I agree that Tackett was acting like he thought Micah should have been able to, and not that he'd already realized this was an issue. So yeah, I have to agree on this point that it wasn't something a "good Dom" would have done to his sub. But, as I noted above, Tackett's not used to working with a sub in this sort of "longer-term" manner, so he was learning as well, and I DID get that feeling from the scene. 
 I do have to agree that the sensory deprivation scene didn't sit right with me because it felt like too much too fast for overcoming a hard limit. 
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