Perfectly Reasonable Deviations from the Beaten Track

{{Infobox book

| name = Perfectly Reasonable Deviations from the Beaten Track

| title_orig =

| translator =

| image = Perfectly Reasonable Deviations from the Beaten Track.jpg

| image_caption = First edition cover

| author = Richard P. Feynman

| illustrator =

| editor = Michelle Feynman

| cover_artist =

| country = United States

| language = English

| series =

| subject =

| genre = Anthology

| publisher = Basic Books

| pub_date = 5 April 2005

| english_pub_date =

| media_type = Print

| pages = 486 pp.

| isbn = 978-0738206363

| oclc =

| dewey =

| congress =

| preceded_by =

| followed_by =

}}

Perfectly Reasonable Deviations from the Beaten Track: The Letters of Richard P. Feynman is a collection of Nobel Prize winner Richard Feynman's letters.{{cite web

|last=Zernike

|first=Kate

|authorlink=Kate Zernike

|title='Perfectly Reasonable Deviations From the Beaten Track': A Word From the Wise

|work=The New York Times

|date=2005-05-08

|url=https://www.nytimes.com/2005/05/08/books/review/08ZERNIKE.html

|accessdate=2009-07-26

|archive-date=2008-12-11

|archive-url=https://web.archive.org/web/20081211010727/http://www.nytimes.com/2005/05/08/books/review/08ZERNIKE.html

|url-status=live

}}{{cite web

|last=Wyatt

|first=Edward

|title=The Scientist Is Gone, But Not His Book Tour

|work=The New York Times

|date=2005-04-07

|url=https://query.nytimes.com/gst/fullpage.html?res=9F05E4DC163EF934A35757C0A9639C8B63

|accessdate=2009-07-26

|archive-date=2012-11-08

|archive-url=https://web.archive.org/web/20121108002942/http://query.nytimes.com/gst/fullpage.html?res=9F05E4DC163EF934A35757C0A9639C8B63

|url-status=live

}}{{cite web

|last=Chown

|first=Marcus

|authorlink=Marcus Chown

|title=Perfectly Reasonable Deviations from the Beaten Track: The letters of Richard P. Feynman

|work=New Scientist

|date=2005-03-26

|url=https://www.newscientist.com/article/mg18524921.800

|accessdate=2009-07-26

|archive-date=2009-08-12

|archive-url=https://web.archive.org/web/20090812140015/http://www.newscientist.com/article/mg18524921.800

|url-status=live

}}

The book was edited by his daughter, Michelle Feynman, and includes a foreword by Timothy Ferris. The book is also titled Don't You Have Time to Think?{{cite web

|last = Clegg

|first = Brian

|authorlink = Brian Clegg (writer)

|title = Review - Perfectly Reasonable Deviations

|work = Popular Science

|publisher = Creativity Unleashed Limited

|url = http://www.popularscience.co.uk/reviews/rev184.htm

|accessdate = 2009-07-26

|archive-url = https://web.archive.org/web/20091019001350/http://www.popularscience.co.uk/reviews/rev184.htm

|archive-date = 2009-10-19

|url-status = dead

}}