These are the second books in both running series. The first books were previously given away, if you missed that, don’t worry. Both are available free with KU or are just 99p in the UK, around $1.39 in the US.
Links to the other two books:
Clue of the Ghostly Trail https://books2read.com/u/bw7Rvv
Have a great week!
Love, Trisha. x