Trott - Melodious Double-Stops for Violin, Books 1 and 2 - Violin - published by G Schirmer

I regularly use this book in my teaching. It has a good progression of difficulties, & students that look to the end while just starting are surprised (either inspired or terrified) by how crazy difficult the last few pieces in the book appear.
Nice tunes, a nice mixture of characters. Well laid out. It is intended as “first position only” which leads to some oddly marked fingerings which I would suggest changing. Watermanviolin.com

Trott Double Stops are excellent. There are very few double stop etudes in the etude books, except for several difficult ones in Kreuzer. Trott Etudes are bene-ficial for my more advanced students, many of whom seem to like playing them.

Love that this book starts very easy and take students effortlessly to confident player.

I use this book with nearly all of my intermediate students