I'm writing this letter to express my gratitude to you for lending me a book on Electronics design concepts.As i was working on my client projects, I need to make a presentation for a project called DC electronic power device. where I was lagging with ideas to present that presentation. I have searched on google and other websites but did not get much theory part which is needed. I hope you remember long back, you have lent me this book and this book helped me to present my ideas clearly.