Shrewpaw was a RiverClan warrior in the "Warriors" book series by Erin Hunter. He was a skilled and brave cat who trained and fought alongside his clanmates. Unfortunately, he met a tragic end during a battle with ShadowClan.
Spiderleg did not die yet in the series.
No, her death is not recorded.
He was hit by a twoleg monster. (Monsters means cars)
So far she has not died, and it is possible she will not die in the series, but retire.
Leopardstar dies in Fading Echoes
Shrewpaw's warrior name would likely be Shrewclaw, following the pattern of changing "paw" to "claw" upon becoming a warrior.
Shrewpaw died from injuries sustained after falling off a cliff during battle training with ShadowClan. He was not able to recover from his injuries and died shortly after the incident.
Not so far as the end of the Power of Three.
I'm unable to predict specific events in a book series. In the Warriors series, characters face various challenges and outcomes that are determined by the story's plot. It's best to read the books to find out what happens to Leafpool.
Ferncloud, a character in the Warriors book series, had four litters of kits. Her first litter had Dustpelt and Brindleface, the second litter had Shrewpaw and Spiderleg, the third litter had Hollykit, Larchkit, and Birchkit, and the fourth litter had Foxleap and Icecloud.
The first series is just the Warriors series. It starts with Into the Wild.