Prefer paperback editions? — both Amazon and Barnes & Noble offer this option online through the links above. Or, if you would prefer to support your local bookstore (which I think is a great idea since the bookstore gains and the cost is the same to you), they will be happy to order any or all or the books for you. To help them find the link to their suppliers, here are the ISBNs for each book.
Rare Traits: 978-1-912-406-05-0
Delusional Traits: 978-1-912406-06-7
Murderous Traits: 978-1-912406-07-4
And once you have read each book, please remember to post a review on your ereader site or on Goodreads! Thank you in advance.
Happy reading! :)