Shelly Laurenston has written several books about shapeshifters under this name and as G. A. Aiken. Some of them concentrate on three girlfriends, Sara, Miki and Angie, and the shapeshifters they fall in love with. Since two of these men are from the wolf-shifters of the Magnus Pack, the author calls this series 'Magnus Pack'. The first book is 'Pack Challenge', this book contains the 2nd of these stories, the third is the novel 'Here kitty, kitty!', and there's another novella about one of the characters from 'Go fetch' in the anthology 'When he was bad'.
Sara (the leading character in 'Pack Challenge') has joined the Magnus Pack, which means that her two best (and human) friends, Miki and Angie, suddenly find themselves in close contact with the shapeshifters. The powerful wolf-shifter Conall and the intelligent, but aggressive and foul-mouthed Miki feel strongly attracted to each other from the start, but it takes a threat to Miki's life from the hyena-shifters to bring the two together...
This novel is a paranormal romance with a strong erotic component, just like the rest of the series. All three girls are aggressive and foul-mouthed to the point of being rude. A large part of the humor of the books comes from that character trait. And that willingness to fight verbally and physically is also part of what makes these women attractive to shifters who appreciate strength in women - naturally, because that's what wolves and other predators do. So you shouldn't expect sweet romance, the books are also not really plot-driven (like Kim Harrison etc.), but they are simply about two people getting together, a lot of fighting and a biting sense of humour throughout it all. It reminded me of MaryJanice Davidson's early books (e. g. the Wyndham werewolf-novellas), basically paranormal erotic chic-lit with a sense of humour. As such, I found 'Go fetch!' entertaining and fun. It's certainly not high literature, but enjoyable.