First, you must read Lost To You before you read Take This Regret. Though they were published out of order, now that the prologue (Lost To You) is published, it makes Regret SO much better.
It's not really hard to read through goosebumps but it is really hard to read through tears. Good LORD, this is an amazing love story *slash* prologue to an even more emotional follow-up book.
I cried my damn eyeballs out of my damn face while reading both of these damn books. So much damn regret and sorrow and hurt and emotion is wrapped up in these books, it makes it hard, yet at the same time easy, to love these characters. I know that doesn't really make sense, but my brain is so mushed up from crying all damn day from this book, I just want to say READ THESE BOOKS. But be prepared to sob uncontrollably if you have a heart.