I think once a month would be a safe commitment. It might take me a couple of weeks to read the book, depending on how long it is. And how addictive! ;) Then there's the review. If you're looking for just a brief impression, that shouldn't take long. if you're looking for something more indepth, that might take another week or so to do in my spare time.
Yes I would love to do book reviews for Barnmice as would my fiancee he is recovering from a shattered pelvis and is home all day and loves to read any horse book he can as he is just learning about horses.
P.S. No he did not get hurt on a horse he fell off our tractor trailer.